4 examples of 'python find string in file' in Python

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def _find_line(string, file_name):
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    """
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    find the first occurence of a string in a file
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    """
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    with open(file_name, 'r') as fi:
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        for line in fi:
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            if string in line:
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                return line

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def replace_in_file(filename, search, replace):
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    # Read in the file
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    filedata = None
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    with open(filename, 'r') as file :
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      filedata = file.read()
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    # Replace the target string
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    filedata = filedata.replace(search, replace)
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    # Write the file out again
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    with open(filename, 'w') as file:
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      file.write(filedata)

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def look_up_string(self, string_index):
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    """Looks up the specified string index in this PEX file's string
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    table."""
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    self.read_pex_file(up_to='string_table')
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    return self.string_table.stored_strings[string_index].str_val

5
def replace_in_file(file_path, search, replace):
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    with open(file_path, "r") as handle:
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        content = handle.read()
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        if search not in content:
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            raise Exception("Incorrect development version in conans/__init__.py")
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    content = content.replace(search, replace)
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    content = content.encode("utf-8")
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    with open(file_path, "wb") as handle:
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        handle.write(content)