[C++/Python] Decimal conversion not working for exponential notation #18120

Closed
Closed
[C++/Python] Decimal conversion not working for exponential notation#18120
Assignees
cpcloud
Labels
Component: PythonType: bug
Milestone
0.9.0

Description

@asfimport
asfimport
opened on Feb 14, 2018
importpyarrowaspaimportpandasaspdimportdecimalpa.Table.from_pandas(pd.DataFrame({'a': [decimal.Decimal('1.1'), decimal.Decimal('2E+1')]}))

Traceback (mostrecentcalllast):
File"<stdin>", line1, in <module>
File"pyarrow/table.pxi", line875, inpyarrow.lib.Table.from_pandas (/arrow/python/build/temp.linux-x86_64-3.6/lib.cxx:44927)
File"/home/skadlec/.local/lib/python3.6/site-packages/pyarrow/pandas_compat.py", line350, indataframe_to_arraysconvert_types)]
File"/home/skadlec/.local/lib/python3.6/site-packages/pyarrow/pandas_compat.py", line349, in <listcomp>
forc, tinzip(columns_to_convert,
File"/home/skadlec/.local/lib/python3.6/site-packages/pyarrow/pandas_compat.py", line345, inconvert_columnreturnpa.array(col, from_pandas=True, type=ty)
File"pyarrow/array.pxi", line170, inpyarrow.lib.array (/arrow/python/build/temp.linux-x86_64-3.6/lib.cxx:29224)
File"pyarrow/array.pxi", line70, inpyarrow.lib._ndarray_to_array (/arrow/python/build/temp.linux-x86_64-3.6/lib.cxx:28465)
File"pyarrow/error.pxi", line77, inpyarrow.lib.check_status (/arrow/python/build/temp.linux-x86_64-3.6/lib.cxx:8270)
pyarrow.lib.ArrowInvalid: Expectedbasetendigitordecimalpointbutfound'E'instead.

In manual cases clearly we can write decimal.Decimal('20') instead of decimal.Decimal('2E+1') but during arithmetical operations inside an application the exponential notation can be produced out of control (it is actually the normalized form of the decimal number) plus for some values the exponential notation is the only form expressing the significance so this should be accepted.

The documentation suggests using following transformation but that's only possible when the significance information doesn't need to be kept:

defremove_exponent(d):
returnd.quantize(Decimal(1)) ifd == d.to_integral() elsed.normalize()

Reporter: Antony Mayi / @antonymayi
Assignee: Phillip Cloud / @cpcloud

Related issues:

PRs and other links:

Note: This issue was originally created as ARROW-2153. Please see the migration documentation for further details.

Metadata

Metadata

Assignees

Labels

Component: PythonType: bug

Type

No type

Projects

No projects

    Milestone

    Relationships

    None yet

    Development

    No branches or pull requests

    Issue actions

    , 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
     blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

    Skip to content
    [C++/Python] Decimal conversion not working for exponential notation #18120
    Closed
    Closed
    [C++/Python] Decimal conversion not working for exponential notation#18120
    Assignees
    cpcloud
    Labels
    Component: PythonType: bug
    Milestone
    0.9.0
    Description
    @asfimport
    asfimport
    opened on Feb 14, 2018
    importpyarrowaspaimportpandasaspdimportdecimalpa.Table.from_pandas(pd.DataFrame({'a': [decimal.Decimal('1.1'), decimal.Decimal('2E+1')]}))
    Traceback (mostrecentcalllast):
File"<stdin>", line1, in <module>
File"pyarrow/table.pxi", line875, inpyarrow.lib.Table.from_pandas (/arrow/python/build/temp.linux-x86_64-3.6/lib.cxx:44927)
File"/home/skadlec/.local/lib/python3.6/site-packages/pyarrow/pandas_compat.py", line350, indataframe_to_arraysconvert_types)]
File"/home/skadlec/.local/lib/python3.6/site-packages/pyarrow/pandas_compat.py", line349, in <listcomp>
forc, tinzip(columns_to_convert,
File"/home/skadlec/.local/lib/python3.6/site-packages/pyarrow/pandas_compat.py", line345, inconvert_columnreturnpa.array(col, from_pandas=True, type=ty)
File"pyarrow/array.pxi", line170, inpyarrow.lib.array (/arrow/python/build/temp.linux-x86_64-3.6/lib.cxx:29224)
File"pyarrow/array.pxi", line70, inpyarrow.lib._ndarray_to_array (/arrow/python/build/temp.linux-x86_64-3.6/lib.cxx:28465)
File"pyarrow/error.pxi", line77, inpyarrow.lib.check_status (/arrow/python/build/temp.linux-x86_64-3.6/lib.cxx:8270)
pyarrow.lib.ArrowInvalid: Expectedbasetendigitordecimalpointbutfound'E'instead.
    In manual cases clearly we can write decimal.Decimal('20') instead of decimal.Decimal('2E+1') but during arithmetical operations inside an application the exponential notation can be produced out of control (it is actually the normalized form of the decimal number) plus for some values the exponential notation is the only form expressing the significance so this should be accepted.
    The documentation suggests using following transformation but that's only possible when the significance information doesn't need to be kept:
    defremove_exponent(d):
returnd.quantize(Decimal(1)) ifd == d.to_integral() elsed.normalize()
    Reporter: Antony Mayi / @antonymayi
    Assignee: Phillip Cloud / @cpcloud
    Related issues:
    PRs and other links:
    Note: This issue was originally created as ARROW-2153. Please see the migration documentation for further details.
    Metadata
    Metadata
    Assignees
    Labels
    Component: PythonType: bug
    Type
    No type
    Projects
    No projects
      Milestone
      Relationships
      None yet
      Development
      No branches or pull requests
      Issue actions
      
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

      Skip to content
      [C++/Python] Decimal conversion not working for exponential notation #18120
      Closed
      Closed
      [C++/Python] Decimal conversion not working for exponential notation#18120
      Assignees
      cpcloud
      Labels
      Component: PythonType: bug
      Milestone
      0.9.0
      Description
      @asfimport
      asfimport
      opened on Feb 14, 2018
      importpyarrowaspaimportpandasaspdimportdecimalpa.Table.from_pandas(pd.DataFrame({'a': [decimal.Decimal('1.1'), decimal.Decimal('2E+1')]}))
      Traceback (mostrecentcalllast):
File"<stdin>", line1, in <module>
File"pyarrow/table.pxi", line875, inpyarrow.lib.Table.from_pandas (/arrow/python/build/temp.linux-x86_64-3.6/lib.cxx:44927)
File"/home/skadlec/.local/lib/python3.6/site-packages/pyarrow/pandas_compat.py", line350, indataframe_to_arraysconvert_types)]
File"/home/skadlec/.local/lib/python3.6/site-packages/pyarrow/pandas_compat.py", line349, in <listcomp>
forc, tinzip(columns_to_convert,
File"/home/skadlec/.local/lib/python3.6/site-packages/pyarrow/pandas_compat.py", line345, inconvert_columnreturnpa.array(col, from_pandas=True, type=ty)
File"pyarrow/array.pxi", line170, inpyarrow.lib.array (/arrow/python/build/temp.linux-x86_64-3.6/lib.cxx:29224)
File"pyarrow/array.pxi", line70, inpyarrow.lib._ndarray_to_array (/arrow/python/build/temp.linux-x86_64-3.6/lib.cxx:28465)
File"pyarrow/error.pxi", line77, inpyarrow.lib.check_status (/arrow/python/build/temp.linux-x86_64-3.6/lib.cxx:8270)
pyarrow.lib.ArrowInvalid: Expectedbasetendigitordecimalpointbutfound'E'instead.
      In manual cases clearly we can write decimal.Decimal('20') instead of decimal.Decimal('2E+1') but during arithmetical operations inside an application the exponential notation can be produced out of control (it is actually the normalized form of the decimal number) plus for some values the exponential notation is the only form expressing the significance so this should be accepted.
      The documentation suggests using following transformation but that's only possible when the significance information doesn't need to be kept:
      defremove_exponent(d):
returnd.quantize(Decimal(1)) ifd == d.to_integral() elsed.normalize()
      Reporter: Antony Mayi / @antonymayi
      Assignee: Phillip Cloud / @cpcloud
      Related issues:
      PRs and other links:
      Note: This issue was originally created as ARROW-2153. Please see the migration documentation for further details.
      Metadata
      Metadata
      Assignees
      Labels
      Component: PythonType: bug
      Type
      No type
      Projects
      No projects
        Milestone
        Relationships
        None yet
        Development
        No branches or pull requests
        Issue actions
        
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

        Skip to content
        [C++/Python] Decimal conversion not working for exponential notation #18120
        Closed
        Closed
        [C++/Python] Decimal conversion not working for exponential notation#18120
        Assignees
        cpcloud
        Labels
        Component: PythonType: bug
        Milestone
        0.9.0
        Description
        @asfimport
        asfimport
        opened on Feb 14, 2018
        importpyarrowaspaimportpandasaspdimportdecimalpa.Table.from_pandas(pd.DataFrame({'a': [decimal.Decimal('1.1'), decimal.Decimal('2E+1')]}))
        Traceback (mostrecentcalllast):
File"<stdin>", line1, in <module>
File"pyarrow/table.pxi", line875, inpyarrow.lib.Table.from_pandas (/arrow/python/build/temp.linux-x86_64-3.6/lib.cxx:44927)
File"/home/skadlec/.local/lib/python3.6/site-packages/pyarrow/pandas_compat.py", line350, indataframe_to_arraysconvert_types)]
File"/home/skadlec/.local/lib/python3.6/site-packages/pyarrow/pandas_compat.py", line349, in <listcomp>
forc, tinzip(columns_to_convert,
File"/home/skadlec/.local/lib/python3.6/site-packages/pyarrow/pandas_compat.py", line345, inconvert_columnreturnpa.array(col, from_pandas=True, type=ty)
File"pyarrow/array.pxi", line170, inpyarrow.lib.array (/arrow/python/build/temp.linux-x86_64-3.6/lib.cxx:29224)
File"pyarrow/array.pxi", line70, inpyarrow.lib._ndarray_to_array (/arrow/python/build/temp.linux-x86_64-3.6/lib.cxx:28465)
File"pyarrow/error.pxi", line77, inpyarrow.lib.check_status (/arrow/python/build/temp.linux-x86_64-3.6/lib.cxx:8270)
pyarrow.lib.ArrowInvalid: Expectedbasetendigitordecimalpointbutfound'E'instead.
        In manual cases clearly we can write decimal.Decimal('20') instead of decimal.Decimal('2E+1') but during arithmetical operations inside an application the exponential notation can be produced out of control (it is actually the normalized form of the decimal number) plus for some values the exponential notation is the only form expressing the significance so this should be accepted.
        The documentation suggests using following transformation but that's only possible when the significance information doesn't need to be kept:
        defremove_exponent(d):
returnd.quantize(Decimal(1)) ifd == d.to_integral() elsed.normalize()
        Reporter: Antony Mayi / @antonymayi
        Assignee: Phillip Cloud / @cpcloud
        Related issues:
        PRs and other links:
        Note: This issue was originally created as ARROW-2153. Please see the migration documentation for further details.
        Metadata
        Metadata
        Assignees
        Labels
        Component: PythonType: bug
        Type
        No type
        Projects
        No projects
          Milestone
          Relationships
          None yet
          Development
          No branches or pull requests
          Issue actions
          
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

          Skip to content
          [C++/Python] Decimal conversion not working for exponential notation #18120
          Closed
          Closed
          [C++/Python] Decimal conversion not working for exponential notation#18120
          Assignees
          cpcloud
          Labels
          Component: PythonType: bug
          Milestone
          0.9.0
          Description
          @asfimport
          asfimport
          opened on Feb 14, 2018
          importpyarrowaspaimportpandasaspdimportdecimalpa.Table.from_pandas(pd.DataFrame({'a': [decimal.Decimal('1.1'), decimal.Decimal('2E+1')]}))
          Traceback (mostrecentcalllast):
File"<stdin>", line1, in <module>
File"pyarrow/table.pxi", line875, inpyarrow.lib.Table.from_pandas (/arrow/python/build/temp.linux-x86_64-3.6/lib.cxx:44927)
File"/home/skadlec/.local/lib/python3.6/site-packages/pyarrow/pandas_compat.py", line350, indataframe_to_arraysconvert_types)]
File"/home/skadlec/.local/lib/python3.6/site-packages/pyarrow/pandas_compat.py", line349, in <listcomp>
forc, tinzip(columns_to_convert,
File"/home/skadlec/.local/lib/python3.6/site-packages/pyarrow/pandas_compat.py", line345, inconvert_columnreturnpa.array(col, from_pandas=True, type=ty)
File"pyarrow/array.pxi", line170, inpyarrow.lib.array (/arrow/python/build/temp.linux-x86_64-3.6/lib.cxx:29224)
File"pyarrow/array.pxi", line70, inpyarrow.lib._ndarray_to_array (/arrow/python/build/temp.linux-x86_64-3.6/lib.cxx:28465)
File"pyarrow/error.pxi", line77, inpyarrow.lib.check_status (/arrow/python/build/temp.linux-x86_64-3.6/lib.cxx:8270)
pyarrow.lib.ArrowInvalid: Expectedbasetendigitordecimalpointbutfound'E'instead.
          In manual cases clearly we can write decimal.Decimal('20') instead of decimal.Decimal('2E+1') but during arithmetical operations inside an application the exponential notation can be produced out of control (it is actually the normalized form of the decimal number) plus for some values the exponential notation is the only form expressing the significance so this should be accepted.
          The documentation suggests using following transformation but that's only possible when the significance information doesn't need to be kept:
          defremove_exponent(d):
returnd.quantize(Decimal(1)) ifd == d.to_integral() elsed.normalize()
          Reporter: Antony Mayi / @antonymayi
          Assignee: Phillip Cloud / @cpcloud
          Related issues:
          PRs and other links:
          Note: This issue was originally created as ARROW-2153. Please see the migration documentation for further details.
          Metadata
          Metadata
          Assignees
          Labels
          Component: PythonType: bug
          Type
          No type
          Projects
          No projects
            Milestone
            Relationships
            None yet
            Development
            No branches or pull requests
            Issue actions
            
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

            Skip to content
            [C++/Python] Decimal conversion not working for exponential notation #18120
            Closed
            Closed
            [C++/Python] Decimal conversion not working for exponential notation#18120
            Assignees
            cpcloud
            Labels
            Component: PythonType: bug
            Milestone
            0.9.0
            Description
            @asfimport
            asfimport
            opened on Feb 14, 2018
            importpyarrowaspaimportpandasaspdimportdecimalpa.Table.from_pandas(pd.DataFrame({'a': [decimal.Decimal('1.1'), decimal.Decimal('2E+1')]}))
            Traceback (mostrecentcalllast):
File"<stdin>", line1, in <module>
File"pyarrow/table.pxi", line875, inpyarrow.lib.Table.from_pandas (/arrow/python/build/temp.linux-x86_64-3.6/lib.cxx:44927)
File"/home/skadlec/.local/lib/python3.6/site-packages/pyarrow/pandas_compat.py", line350, indataframe_to_arraysconvert_types)]
File"/home/skadlec/.local/lib/python3.6/site-packages/pyarrow/pandas_compat.py", line349, in <listcomp>
forc, tinzip(columns_to_convert,
File"/home/skadlec/.local/lib/python3.6/site-packages/pyarrow/pandas_compat.py", line345, inconvert_columnreturnpa.array(col, from_pandas=True, type=ty)
File"pyarrow/array.pxi", line170, inpyarrow.lib.array (/arrow/python/build/temp.linux-x86_64-3.6/lib.cxx:29224)
File"pyarrow/array.pxi", line70, inpyarrow.lib._ndarray_to_array (/arrow/python/build/temp.linux-x86_64-3.6/lib.cxx:28465)
File"pyarrow/error.pxi", line77, inpyarrow.lib.check_status (/arrow/python/build/temp.linux-x86_64-3.6/lib.cxx:8270)
pyarrow.lib.ArrowInvalid: Expectedbasetendigitordecimalpointbutfound'E'instead.
            In manual cases clearly we can write decimal.Decimal('20') instead of decimal.Decimal('2E+1') but during arithmetical operations inside an application the exponential notation can be produced out of control (it is actually the normalized form of the decimal number) plus for some values the exponential notation is the only form expressing the significance so this should be accepted.
            The documentation suggests using following transformation but that's only possible when the significance information doesn't need to be kept:
            defremove_exponent(d):
returnd.quantize(Decimal(1)) ifd == d.to_integral() elsed.normalize()
            Reporter: Antony Mayi / @antonymayi
            Assignee: Phillip Cloud / @cpcloud
            Related issues:
            PRs and other links:
            Note: This issue was originally created as ARROW-2153. Please see the migration documentation for further details.
            Metadata
            Metadata
            Assignees
            Labels
            Component: PythonType: bug
            Type
            No type
            Projects
            No projects
              Milestone
              Relationships
              None yet
              Development
              No branches or pull requests
              Issue actions
              
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

              Skip to content
              [C++/Python] Decimal conversion not working for exponential notation #18120
              Closed
              Closed
              [C++/Python] Decimal conversion not working for exponential notation#18120
              Assignees
              cpcloud
              Labels
              Component: PythonType: bug
              Milestone
              0.9.0
              Description
              @asfimport
              asfimport
              opened on Feb 14, 2018
              importpyarrowaspaimportpandasaspdimportdecimalpa.Table.from_pandas(pd.DataFrame({'a': [decimal.Decimal('1.1'), decimal.Decimal('2E+1')]}))
              Traceback (mostrecentcalllast):
File"<stdin>", line1, in <module>
File"pyarrow/table.pxi", line875, inpyarrow.lib.Table.from_pandas (/arrow/python/build/temp.linux-x86_64-3.6/lib.cxx:44927)
File"/home/skadlec/.local/lib/python3.6/site-packages/pyarrow/pandas_compat.py", line350, indataframe_to_arraysconvert_types)]
File"/home/skadlec/.local/lib/python3.6/site-packages/pyarrow/pandas_compat.py", line349, in <listcomp>
forc, tinzip(columns_to_convert,
File"/home/skadlec/.local/lib/python3.6/site-packages/pyarrow/pandas_compat.py", line345, inconvert_columnreturnpa.array(col, from_pandas=True, type=ty)
File"pyarrow/array.pxi", line170, inpyarrow.lib.array (/arrow/python/build/temp.linux-x86_64-3.6/lib.cxx:29224)
File"pyarrow/array.pxi", line70, inpyarrow.lib._ndarray_to_array (/arrow/python/build/temp.linux-x86_64-3.6/lib.cxx:28465)
File"pyarrow/error.pxi", line77, inpyarrow.lib.check_status (/arrow/python/build/temp.linux-x86_64-3.6/lib.cxx:8270)
pyarrow.lib.ArrowInvalid: Expectedbasetendigitordecimalpointbutfound'E'instead.
              In manual cases clearly we can write decimal.Decimal('20') instead of decimal.Decimal('2E+1') but during arithmetical operations inside an application the exponential notation can be produced out of control (it is actually the normalized form of the decimal number) plus for some values the exponential notation is the only form expressing the significance so this should be accepted.
              The documentation suggests using following transformation but that's only possible when the significance information doesn't need to be kept:
              defremove_exponent(d):
returnd.quantize(Decimal(1)) ifd == d.to_integral() elsed.normalize()
              Reporter: Antony Mayi / @antonymayi
              Assignee: Phillip Cloud / @cpcloud
              Related issues:
              PRs and other links:
              Note: This issue was originally created as ARROW-2153. Please see the migration documentation for further details.
              Metadata
              Metadata
              Assignees
              Labels
              Component: PythonType: bug
              Type
              No type
              Projects
              No projects
                Milestone
                Relationships
                None yet
                Development
                No branches or pull requests
                Issue actions
                
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

                Skip to content
                [C++/Python] Decimal conversion not working for exponential notation #18120
                Closed
                Closed
                [C++/Python] Decimal conversion not working for exponential notation#18120
                Assignees
                cpcloud
                Labels
                Component: PythonType: bug
                Milestone
                0.9.0
                Description
                @asfimport
                asfimport
                opened on Feb 14, 2018
                importpyarrowaspaimportpandasaspdimportdecimalpa.Table.from_pandas(pd.DataFrame({'a': [decimal.Decimal('1.1'), decimal.Decimal('2E+1')]}))
                Traceback (mostrecentcalllast):
File"<stdin>", line1, in <module>
File"pyarrow/table.pxi", line875, inpyarrow.lib.Table.from_pandas (/arrow/python/build/temp.linux-x86_64-3.6/lib.cxx:44927)
File"/home/skadlec/.local/lib/python3.6/site-packages/pyarrow/pandas_compat.py", line350, indataframe_to_arraysconvert_types)]
File"/home/skadlec/.local/lib/python3.6/site-packages/pyarrow/pandas_compat.py", line349, in <listcomp>
forc, tinzip(columns_to_convert,
File"/home/skadlec/.local/lib/python3.6/site-packages/pyarrow/pandas_compat.py", line345, inconvert_columnreturnpa.array(col, from_pandas=True, type=ty)
File"pyarrow/array.pxi", line170, inpyarrow.lib.array (/arrow/python/build/temp.linux-x86_64-3.6/lib.cxx:29224)
File"pyarrow/array.pxi", line70, inpyarrow.lib._ndarray_to_array (/arrow/python/build/temp.linux-x86_64-3.6/lib.cxx:28465)
File"pyarrow/error.pxi", line77, inpyarrow.lib.check_status (/arrow/python/build/temp.linux-x86_64-3.6/lib.cxx:8270)
pyarrow.lib.ArrowInvalid: Expectedbasetendigitordecimalpointbutfound'E'instead.
                In manual cases clearly we can write decimal.Decimal('20') instead of decimal.Decimal('2E+1') but during arithmetical operations inside an application the exponential notation can be produced out of control (it is actually the normalized form of the decimal number) plus for some values the exponential notation is the only form expressing the significance so this should be accepted.
                The documentation suggests using following transformation but that's only possible when the significance information doesn't need to be kept:
                defremove_exponent(d):
returnd.quantize(Decimal(1)) ifd == d.to_integral() elsed.normalize()
                Reporter: Antony Mayi / @antonymayi
                Assignee: Phillip Cloud / @cpcloud
                Related issues:
                PRs and other links:
                Note: This issue was originally created as ARROW-2153. Please see the migration documentation for further details.
                Metadata
                Metadata
                Assignees
                Labels
                Component: PythonType: bug
                Type
                No type
                Projects
                No projects
                  Milestone
                  Relationships
                  None yet
                  Development
                  No branches or pull requests
                  Issue actions