python统计文本字符串里面单词出现的频率的代码_python计算文本区某个符号出现的频率

下面的代码段是关于python统计文本字符串里面单词出现的频率的代码，应该是对各位也有帮助。

# word frequency in a text
# tested with Python24    vegaseat    25aug2005

# Chinese wisdom ...
str1 = """Man who run in front of car, get tired.
Man who run behind car, get exhausted."""
print "Original string:"
print str1

print

# create a list of words separated at whitespaces
wordList1 = str1.split(None)

# strip any punctuation marks and build modified word list
# start with an empty list
wordList2 = []
for word1 in wordList1:
    # last character of each word
    lastchar = word1[-1:]
    # use a list of punctuation marks
    if lastchar in [",", ".", "!", "?", ";"]:
        word2 = word1.rstrip(lastchar)
    else:
        word2 = word1
    # build a wordList of lower case modified words
    wordList2.append(word2.lower())

print "Word list created from modified string:"
print wordList2

print

# create 
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