[英]how to check for specific characters inside csv file using pandas
我已将一个 CSV 文件读入 Pandas 数据框中,并尝试查找包含我正在查找的单词的所有句子,并且在找到其中任何一个时,使用来自主 CSV 的原始索引而不是新索引来打印它。 这是我正在尝试的代码,但由于某种原因它给了我一个错误
lookfor = '[' + re.escape(",?!.:;'؛؛؟'-)(؛،؛«/") + ']'
tdata = pd.read_csv(fileinput, nrows=0).columns[0]
skip = int(tdata.count(' ') == 0)
tdata = pd.read_csv(fileinput, names=['sentences'], skiprows=skip)
newdata=tdata[tdata['sentences'].str.isin(lookfor)]
print (newdata)
#a sample set
-----------------------------
#hi, how are; you
#im good thanks
#How ? Is live.
#good, what about ) you/
#my name is alex
#hello, alex how are you !
#im good!
#great news
#thanks!
-----------------------------
它返回这个错误
newdata=tdata[tdata['sentences'].str.isin(pat)]
AttributeError: 'StringMethods' object has no attribute 'isin'
输入数据看起来像
我期待的输出是
您可能想要“包含”方法,例如
df = tdata[tdata.sentences.str.contains(pat, regex=True, na=False)]
完整的代码应该是这样的;
lookfor = '[' + re.escape(",?!.:;'؛؛؟'-)(؛،؛«/") + ']'
tdata = pd.read_csv(fileinput, nrows=0).columns[0]
skip = int(tdata.count(' ') == 0)
tdata = pd.read_csv(fileinput, names=['sentences'], skiprows=skip)
tdata['row_index'] = 1
tdata['row_index'] = tdata['row_index'].cumsum()
filtered = tdata[tdata.sentences.str.contains(lookfor, regex=True, na=False)]
filtered.to_csv('./my_path.csv', index=False)
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