Python从逗号分隔的值中动态选择值

假设我有以下字符串：

University of example1
Assistent professor, hello, University of example2
Hello, University of example3

如何仅检索包含“University”的值，以便输出如下

University of example1
University of example2
University of example3

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取每个字符串，用逗号分隔，然后检查每个片段是否为“大学”

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您可以将字符串转换为数组，然后使用或列表理解来筛选出不需要的字符串

类似于以下的方法应该可以工作：

# This will probably come from your file IRL
# We want a list of strings that we can split later and parse
plaintext = """University of example1
Assistent professor, hello, University of example2
Hello, University of example3"""
lines = plaintext.splitlines()


# Define a function to pass into filter
# You'll want to change this to taste, maybe use a regexp depending on requirements
def is_uni(text):

    # Strip out any leading spaces
    return text.lstrip().startswith("Uni")

for line in lines:
    for uni in filter(is_uni,line.split(',')):
        print uni

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按照您的意愿使用

有效的\u字符串。
XPath用于选择XML文档的某些部分。为什么要在没有XML的情况下使用XPath？是的，我使用XML，但我正忙于Python scrapy中的一个项目。所以我刮取了我的XML并放入了一个数组。但后来我发现数组中的一些值仍然没有用逗号分隔。但是，我只需要在数组中包含大学值。如果不可能在xml中完成这样的事情，我将在python中寻找其他选项。如果您想使用XPath，请发布XML；否则，请用Python重写并重新标记您的问题。
# This will probably come from your file IRL
# We want a list of strings that we can split later and parse
plaintext = """University of example1
Assistent professor, hello, University of example2
Hello, University of example3"""
lines = plaintext.splitlines()


# Define a function to pass into filter
# You'll want to change this to taste, maybe use a regexp depending on requirements
def is_uni(text):

    # Strip out any leading spaces
    return text.lstrip().startswith("Uni")

for line in lines:
    for uni in filter(is_uni,line.split(',')):
        print uni

data_string = "University of example1
Assistent professor, hello, University of example2
Hello, University of example3"
valid_strings = []
strings = data_string.split(",")
for string in strings:
    if "University" in string:
        valid_strings.append(string)