读入一个Python源程序文件，删除程序中的注释后显示

可以使用Python自带的ast模块来实现删除Python代码中的注释，下面是一个示例代码：

import ast

def remove_comments(source):
    """
    Remove comments from Python source code.
    """
    class CommentRemover(ast.NodeTransformer):
        def visit(self, node):
            if isinstance(node, ast.Expr) and isinstance(node.value, ast.Str):
                return None  # remove the whole node
            return node

    parsed = ast.parse(source)
    transformer = CommentRemover()
    parsed = transformer.visit(parsed)
    return ast.unparse(parsed)

# 示例代码
source_code = """
# This is a comment
print("Hello, World!")  # This is another comment
"""

print(remove_comments(source_code))

输出结果为：

print('Hello, World!')