[英]Python text extraction
我正在使用 python 进行文本提取。 输出并不像我想要的那样理想!
我有一个包含如下信息的文本文件:
FN Clarivate Analytics Web of Science
VR 1.0
PT J
AU Chen, G
Gully, SM
Whiteman, JA
Kilcullen, RN
AF Chen, G
Gully, SM
Whiteman, JA
Kilcullen, RN
TI Examination of relationships among trait-like individual differences,
state-like individual differences, and learning performance
SO JOURNAL OF APPLIED PSYCHOLOGY
CT 13th Annual Conference of the
Society-for-Industrial-and-Organizational-Psychology
CY APR 24-26, 1998
CL DALLAS, TEXAS
SP Soc Ind & Org Psychol
RI Gully, Stanley/D-1302-2012
OI Gully, Stanley/0000-0003-4037-3883
SN 0021-9010
PD DEC
PY 2000
VL 85
IS 6
BP 835
EP 847
DI 10.1037//0021-9010.85.6.835
UT WOS:000165745400001
PM 11125649
ER
当我像这样使用我的代码时
import random
import sys
filepath = "data\jap_2000-2001-plain.txt"
with open(filepath) as f:
articles = f.read().strip().split("\n")
articles_list = []
author = ""
title = ""
year = ""
doi = ""
for article in articles:
if "AU" in article:
author = article.split("#")[-1]
if "TI" in article:
title = article.split("#")[-1]
if "PY" in article:
year = article.split("#")[-1]
if "DI" in article:
doi = article.split("#")[-1]
if article == "ER#":
articles_list.append("{}, {}, {}, https://doi.org/{}".format(author, title, year, doi))
print("Oh hello sir, how many articles do you like to get?")
amount = input()
random_articles = random.sample(articles_list, k = int(amount))
for i in random_articles:
print(i)
print("\n")
exit = input('Please enter exit to exit: \n')
if exit in ['exit','Exit']:
print("Goodbye sir!")
sys.exit()
提取不包括换行后输入的数据,如果我运行此代码,输出看起来像“AU Chen,G”并且不包括其他名称,与标题等相同。
我的输出看起来像:
Chen, G. 特质间关系的检验, 2000, doi.dx.10.1037//0021-9010.85.6.835
所需的输出应该是:
Chen, G., Gully, SM., Whiteman, JA., Kilcullen, RN., 2000,特质样个体差异、状态样个体差异和学习表现之间关系的检验,doi.dx.10.1037//0021 -9010.85.6.835
但提取只包括每一行的第一行——
有什么建议?
您需要在解析文件时跟踪您所在的部分。 有更简洁的方法来编写状态机,但作为一个快速而简单的示例,您可以执行以下操作。
基本上,将每个部分的所有行添加到该部分的列表中,然后组合列表并在最后执行任何操作。 请注意,我没有对此进行测试,只是通过伪编码向您展示总体思路。
authors = []
title = []
section = None
for line in articles:
line = line.strip()
# Check for start of new section, select the right list to add to
if line.startswith("AU"):
line = line[3:]
section = authors
elif line.startswith("TI"):
line = line[3:]
section = title
# Other sections..
...
# Add line to the current section
if line and section is not None:
section.append(line)
authors_str = ', '.join(authors)
title_str = ' '.join(title)
print authors_str, title_str
初步了解
根据你的例子,我相信:
ER
分隔的人工部分标志着记录结束。ER
部分不包含可用的文本。也可能是这样:
FN
标签开始。FN / ER
对之外遇到的任何文本都可以忽略。建议设计
如果这是真的,我建议您使用该逻辑编写文本处理器:
ER
。ER
状态中的文本,直到遇到FN
行。ER
状态时,将累积记录添加到累积记录列表中。在此过程结束时,您将获得一个记录列表,其中包含各种累积的标签。 然后,您可以以各种方式处理标签。
像这样的东西:
from warnings import warn
Debug = True
def read_lines_from(file):
"""Read and split lines from file. This is a separate function, instead
of just using file.readlines(), in case extra work is needed like
dos-to-unix conversion inside a unix environment.
"""
with open(file) as f:
text = f.read()
lines = text.split('\n')
return lines
def parse_file(file):
"""Parse file in format given by
https://stackoverflow.com/questions/54520331
"""
lines = read_lines_from(file)
state = 'ER'
records = []
current = None
for line_no, line in enumerate(lines):
tag, rest = line[:2], line[3:]
if Debug:
print(F"State: {state}, Tag: {tag}, Rest: {rest}")
# Skip empty lines
if tag == '':
if Debug:
print(F"Skip empty line at {line_no}")
continue
if tag == ' ':
# Append text, except in ER state.
if state != 'ER':
if Debug:
print(F"Append text to {state}: {rest}")
current[state].append(rest)
continue
# Found a tag. Process it.
if tag == 'ER':
if Debug:
print("Tag 'ER'. Completed record:")
print(current)
records.append(current)
current = None
state = tag
continue
if tag == 'FN':
if state != 'ER':
warn(F"Found 'FN' tag without previous 'ER' at line {line_no}")
if len(current.keys()):
warn(F"Previous record (FN:{current['FN']}) discarded.")
if Debug:
print("Tag 'FN'. Create empty record.")
current = {}
# All tags except ER get this:
if Debug:
print(F"Tag '{tag}'. Create list with rest: {rest}")
current[tag] = [rest]
state = tag
return records
if __name__ == '__main__':
records = parse_file('input.txt')
print('Records =', records)
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