- Notifications
You must be signed in to change notification settings - Fork 1
Expand file tree
/
Copy pathSortingBigFile.py
More file actions
Latest commit
148 lines (105 loc) · 4.4 KB
/
Copy pathSortingBigFile.py
File metadata and controls
148 lines (105 loc) · 4.4 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
importmath
importsys
importgenerator_random_dataasgrd
importmemory_chunk_moduleasmcm
classFileSplitter(object):
chunk_filenames= []
def__init__(self, filename, chunk_filename_format):
self.filename=filename
self.chunk_filename_format=chunk_filename_format
defwrite_chunk(self, data, chunk_number):
filename=self.chunk_filename_format.format(chunk_number)
file=open(filename, 'w')
file.write(data)
file.close()
FileSplitter.chunk_filenames.append(filename)
defget_chunk_filenames(self):
returnself.chunk_filenames
defsplit(self, chunk_memory):
file=open(self.filename, 'r')
i=0
whileTrue:
lines=file.readlines(chunk_memory)
iflines== []:
break
lines.sort()
self.write_chunk(''.join(lines), i)
i+=1
classMergeSortFile(object):
def__init__(self, total_files):
self.total_files=total_files
defselect(self, choices):
min_index=-1
min_str=None
temp_array= []
forchoiceinchoices:
if(choice!=''andchoice!='\n'):
temp_array.append(int(choice))
foriinrange(self.total_files):
ifmin_strisNone:
ifiinchoices:
min_str=choices[i]
min_index=i
ifiinchoices:
ifint(min_str) >int(choices[i]):
min_str=choices[i]
min_index=i
returnmin_index
classFilesArray(object):
def__init__(self, files):
self.files=files
self.empty=set()
self.num_buffers=len(files)
self.buffers= {i: Noneforiinrange(self.num_buffers)}
defget_dict(self):
return {i: self.buffers[i] foriinrange(self.num_buffers) ifinotinself.empty}
defrefresh(self):
foriinrange(self.num_buffers):
ifself.buffers[i] isNoneandinotinself.empty:
self.buffers[i] =self.files[i].readline()
ifself.buffers[i] =='':
self.empty.add(i)
iflen(self.empty) ==self.num_buffers:
returnFalse
returnTrue
defclean_buffer(self, index):
value=self.buffers[index]
self.buffers[index] =None
returnvalue
classFileMerger(object):
def__init__(self, merger):
self.merger=merger
defmerge(self, filenames, outfilename, buffer_size):
outfile=open(outfilename, 'w', int(math.ceil(buffer_size)))
buffers=FilesArray(self.get_file_handles(filenames, buffer_size))
whilebuffers.refresh():
min_index=self.merger.select(buffers.get_dict())
outfile.write(buffers.clean_buffer(min_index))
defget_file_handles(self, filenames, buffer_size):
files= {}
foriinrange(len(filenames)):
files[i] =open(filenames[i], 'r', int(math.ceil(buffer_size)))
returnfiles
classFileSplitSort(object):
def__init__(self, chunk_memory, cleanup):
self.chunk_memory=chunk_memory
self.cleanup=cleanup
defsort_data(self, filename, chunk_filename_format):
total_chunks=mcm.get_total_chunk(filename, self.chunk_memory)
file_splitter=FileSplitter(filename, chunk_filename_format)
file_splitter.split(self.chunk_memory)
file_merger=FileMerger(MergeSortFile(total_chunks))
buffer_merge_size=self.chunk_memory/ (total_chunks)
output_filename=filename.replace(".txt", "") +'_sorted.txt'
file_merger.merge(file_splitter.get_chunk_filenames(), output_filename, buffer_merge_size)
ifself.cleanup:
mcm.cleanup_chunk_file(FileSplitter.chunk_filenames)
defsort_as_chunk(filename, memory_of_chunk, cleanup_chunk_flag, chunk_filename_format="age_sorted_{0}.txt"):
filesort=FileSplitSort(mcm.get_parsed_memory(memory_of_chunk), cleanup_chunk_flag)
filesort.sort_data(filename, chunk_filename_format)
print("sorting data: success")
if__name__=="__main__":
filename="age.txt"
# Demo
grd.create_file(filename, 10000, 16, 59)
sort_as_chunk(filename, "20K", True)