Question

我正在设置一个脚本，根据文件名中包含的文本合并PDF。我在这里的问题是“Violin I”也包含在“Violin II”中，而“Alto Saxophone I”也包含在“Alto Saxophone II”中。如何设置这个，所以tempList只包含“Violin I”中的条目并排除“Violin II”，反之亦然？

pdfList = ["01 Violin I.pdf", "02 Violin I.pdf","01 Violin II.pdf", "02 Violin II.pdf",  ]
instruments = ["Soprano", "Tenor", "Violin I", "Violin II", "Viola", "Cello", "Contrabass", "Alto Saxophone I", "Alto Saxophone II", "Tenor Saxophone", "Baritone Saxophone"]


# create arrays for each instrument that can be used for merging/organization
def organizer():
    for fileName in pdfList:
        for instrument in instruments:
            tempList = []
            if instrument in fileName:
                tempList.append(fileName)
        print tempList


print pdfList
organizer()

Answer 1

避免包含子串的一种方法是使用正则表达式：

import re

pdfList = ["01 Violin I.pdf", "02 Violin I.pdf","01 Violin II.pdf", "02 Violin \
II.pdf",  ]
instruments = ["Soprano", "Tenor", "Violin I", "Violin II", "Viola", "Cello", "\
Contrabass", "Alto Saxophone I", "Alto Saxophone II", "Tenor Saxophone", "Barit\
one Saxophone"]

# create arrays for each instrument that can be used for merging/organization   
def organizer():
    for fileName in pdfList:
        tempList = []
        for instrument in instruments:
            if re.search(r'\b{}\b'.format(instrument), fileName):
                tempList.append(fileName)
        print tempList

print pdfList
organizer()

这会将您的搜索字词包装为\b，以便只有在开头和结尾位于字边界时才匹配。此外，也许显而易见但值得指出，这也将使你的乐器名称成为正则表达式的一部分，所以请注意，如果你使用任何也是正则表达式元字符的字符，他们将会是这样的（正是你现在的＆＃39;不是）。一个更通用的方案需要一些代码才能找到并正确地转义这些字符。

Answer 2

尝试进行此更改：

...
if instrument+'.pdf' in fileName:
...

这会涵盖所有情况吗？

隔离其他地方包含的字符串

2 个答案: