Search for quotes with regular expression

问题

I'm looking for a way to search a text file for quotes made by author and then print them out. My script so far:

import re

    #searches end of string 
    print re.search('"$', 'i am searching for quotes"')

    #searches start of string 
    print re.search('^"' , '"i am searching for quotes"')

What I would like to do

import re

## load text file
quotelist = open('A.txt','r').read()

## search for strings contained with quotation marks
re.search ("-", quotelist)

## Store in list or Dict
Dict = quotelist

## Print quotes 
print Dict

I also tried

import re

buffer = open('bbc.txt','r').read()

quotes = re.findall(r'.*"[^"].*".*', buffer)
for quote in quotes:
  print quote

# Add quotes to list

 l = []
    for quote in quotes:
    print quote
    l.append(quote)

回答1:

Develop a regular expression that matches all the expected characters you would expect to see inside of a quoted string. Then use the python method findall in re to find all occurrences of the match.

import re

buffer = open('file.txt','r').read()

quotes = re.findall(r'"[^"]*"',buffer)
for quote in quotes:
  print quote

Searching between " and ” requires a unicode-regex search such as:

quotes = re.findall(ur'"[^\u201d]*\u201d',buffer)

And for a document that uses " and ” interchangeably for quotation termination

quotes = re.findall(ur'"[^"^\u201d]*["\u201d]', buffer)

回答2:

You don't need regular expressions to find static strings. You should use this Python idiom for finding strings:

>>> haystack = 'this is the string to search!'
>>> needle = '!'
>>> if needle in haystack:
       print 'Found', needle

Creating a list is easy enough -

>>> matches = []

Storing matches is easy too...

>>> matches.append('add this string to matches')

This should be enough to get you started. Good luck!

An addendum to address the comment below...

l = []
for quote in matches:
    print quote
    l.append(quote)

来源：https://stackoverflow.com/questions/10501959/search-for-quotes-with-regular-expression

标签

python

regex

quotation-marks