40 lines
1.2 KiB
Python
40 lines
1.2 KiB
Python
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import sys
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def replace_text_in_file(fileName: str, old_content: str, newContent: str) -> None:
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"""
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Replace text in a file within the specified range with new content.
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:param fileName: The name of the file to modify.
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:param startPos: The starting position of the range to replace.
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:param endPos: The ending position of the range to replace.
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:param newContent: The new content to replace the specified range with.
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"""
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with open(fileName, 'r') as file:
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content = file.read()
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# how many times old_content occurs in content
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count = content.count(old_content)
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# if count is not 1, then we can't replace the text
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if count != 1:
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# output error message to stderr and exit
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print(f"Error: {old_content} occurs {count} times in {fileName}.", file=sys.stderr)
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exit(-1)
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# replace old_content with new_content
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modified_content = content.replace(old_content, new_content)
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with open(fileName, 'w') as file:
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file.write(modified_content)
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if __name__ == "__main__":
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try:
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file_name = sys.argv[1]
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old_content = sys.argv[2]
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new_content = sys.argv[3]
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replace_text_in_file(file_name, old_content, new_content)
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except Exception as e:
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print(e, file=sys.stderr)
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exit(-1)
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exit(0)
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