3 examples of 'python open stdin' in Python

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def open_python_file(filename):
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    """Open a read-only Python file taking proper care of its encoding.
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    In Python 3, we would like all files to be opened with utf-8 encoding.
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    However, some author like to specify PEP263 headers in their source files
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    with their own encodings. In that case, we should respect the author's
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    encoding.
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    """
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    import tokenize
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    if hasattr(tokenize, "open"):  # Added in Python 3.2
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        # Open file respecting PEP263 encoding. If no encoding header is
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        # found, opens as utf-8.
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        return tokenize.open(filename)
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    else:
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        return open(filename, "r")

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def __init__(self, original_stdin=sys.stdin, *args, **kwargs):
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    try:
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        self.encoding = sys.stdin.encoding
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    except:
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        # Not sure if it's available in all Python versions...
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        pass
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    self.original_stdin = original_stdin
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    try:
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        self.errors = sys.stdin.errors  # Who knew? sys streams have an errors attribute!
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    except:
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        # Not sure if it's available in all Python versions...
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        pass

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def open(self, event=None):
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    '''
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    Open given file
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    '''
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    with open(self.file.path, encoding='UTF-8') as file:
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        file_text = file.read()
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        if file_text:
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            self.modified_event_triggered_by_opening_file = True
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            self.insert(tk.END, file_text)