forked from dictmap/pdf_to_txt
/
pdf2txt.py
190 lines (170 loc) · 8.67 KB
/
pdf2txt.py
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
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
import glob
import pdfplumber
import re
from collections import defaultdict
import json
import os
class PDFProcessor:
def __init__(self, filepath):
self.filepath = filepath
self.pdf = pdfplumber.open(filepath)
self.all_text = defaultdict(dict)
self.allrow = 0
self.last_num = 0
def check_lines(self, page, top, buttom):
lines = page.extract_words()[::]
text = ''
last_top = 0
last_check = 0
for l in range(len(lines)):
each_line = lines[l]
check_re = '(?:。|；|单位：元|单位：万元|币种：人民币|\d|报告(?:全文)?(?:（修订版）|（修订稿）|（更正后）)?)$'
if top == '' and buttom == '':
if abs(last_top - each_line['top']) <= 2:
text = text + each_line['text']
elif last_check > 0 and (page.height * 0.9 - each_line['top']) > 0 and not re.search(check_re, text):
text = text + each_line['text']
else:
text = text + '\n' + each_line['text']
elif top == '':
if each_line['top'] > buttom:
if abs(last_top - each_line['top']) <= 2:
text = text + each_line['text']
elif last_check > 0 and (page.height * 0.85 - each_line['top']) > 0 and not re.search(check_re,
text):
text = text + each_line['text']
else:
text = text + '\n' + each_line['text']
else:
if each_line['top'] < top and each_line['top'] > buttom:
if abs(last_top - each_line['top']) <= 2:
text = text + each_line['text']
elif last_check > 0 and (page.height * 0.85 - each_line['top']) > 0 and not re.search(check_re,
text):
text = text + each_line['text']
else:
text = text + '\n' + each_line['text']
last_top = each_line['top']
last_check = each_line['x1'] - page.width * 0.85
return text
def drop_empty_cols(self, data):
# 删除所有列为空数据的列
transposed_data = list(map(list, zip(*data)))
filtered_data = [col for col in transposed_data if not all(cell == '' for cell in col)]
result = list(map(list, zip(*filtered_data)))
return result
def extract_text_and_tables(self, page):
buttom = 0
tables = page.find_tables(table_settings={'intersection_x_tolerance': 1})
if len(tables) >= 1:
count = len(tables)
for table in tables:
if table.bbox[3] < buttom:
pass
else:
count -= 1
top = table.bbox[1]
text = self.check_lines(page, top, buttom)
text_list = text.split('\n')
for _t in range(len(text_list)):
self.all_text[self.allrow] = {'page': page.page_number, 'allrow': self.allrow,
'type': 'text', 'inside': text_list[_t]}
self.allrow += 1
buttom = table.bbox[3]
new_table = table.extract()
r_count = 0
for r in range(len(new_table)):
row = new_table[r]
if row[0] is None:
r_count += 1
for c in range(len(row)):
if row[c] is not None and row[c] not in ['', ' ']:
if new_table[r - r_count][c] is None:
new_table[r - r_count][c] = row[c]
else:
new_table[r - r_count][c] += row[c]
new_table[r][c] = None
else:
r_count = 0
end_table = []
for row in new_table:
if row[0] != None:
cell_list = []
cell_check = False
for cell in row:
if cell != None:
cell = cell.replace('\n', '')
else:
cell = ''
if cell != '':
cell_check = True
cell_list.append(cell)
if cell_check == True:
end_table.append(cell_list)
end_table = self.drop_empty_cols(end_table)
for row in end_table:
self.all_text[self.allrow] = {'page': page.page_number, 'allrow': self.allrow,
'type': 'excel', 'inside': str(row)}
# self.all_text[self.allrow] = {'page': page.page_number, 'allrow': self.allrow, 'type': 'excel',
# 'inside': ' '.join(row)}
self.allrow += 1
if count == 0:
text = self.check_lines(page, '', buttom)
text_list = text.split('\n')
for _t in range(len(text_list)):
self.all_text[self.allrow] = {'page': page.page_number, 'allrow': self.allrow,
'type': 'text', 'inside': text_list[_t]}
self.allrow += 1
else:
text = self.check_lines(page, '', '')
text_list = text.split('\n')
for _t in range(len(text_list)):
self.all_text[self.allrow] = {'page': page.page_number, 'allrow': self.allrow,
'type': 'text', 'inside': text_list[_t]}
self.allrow += 1
first_re = '[^计](?:报告(?:全文)?(?:（修订版）|（修订稿）|（更正后）)?)$'
end_re = '^(?:\d|\\|\/|第|共|页|-|_| ){1,}'
if self.last_num == 0:
try:
first_text = str(self.all_text[1]['inside'])
end_text = str(self.all_text[len(self.all_text) - 1]['inside'])
if re.search(first_re, first_text) and not '[' in end_text:
self.all_text[1]['type'] = '页眉'
if re.search(end_re, end_text) and not '[' in end_text:
self.all_text[len(self.all_text) - 1]['type'] = '页脚'
except:
print(page.page_number)
else:
try:
first_text = str(self.all_text[self.last_num + 2]['inside'])
end_text = str(self.all_text[len(self.all_text) - 1]['inside'])
if re.search(first_re, first_text) and '[' not in end_text:
self.all_text[self.last_num + 2]['type'] = '页眉'
if re.search(end_re, end_text) and '[' not in end_text:
self.all_text[len(self.all_text) - 1]['type'] = '页脚'
except:
print(page.page_number)
self.last_num = len(self.all_text) - 1
def process_pdf(self):
for i in range(len(self.pdf.pages)):
self.extract_text_and_tables(self.pdf.pages[i])
def save_all_text(self, path):
for key in self.all_text.keys():
with open(path, 'a+', encoding='utf-8') as file:
file.write(json.dumps(self.all_text[key], ensure_ascii=False) + '\n')
def process_all_pdfs_in_folder(folder_path):
file_paths = glob.glob(f'{folder_path}/*')
file_paths = sorted(file_paths, reverse=True)
for file_path in file_paths:
print(file_path)
try:
processor = PDFProcessor(file_path)
processor.process_pdf()
if not os.path.exists(file_path):
os.makedirs('alltxt')
save_path = 'alltxt/' + file_path.split('/')[-1].replace('.pdf', '.txt')
processor.save_all_text(save_path)
except:
print('check')
folder_path = 'allpdf'
process_all_pdfs_in_folder(folder_path)