#templates.py import fileinput, re field_pat = re.compile(r'\[(.*?)\]') scope = {} def replacement(match):   code = match.group(1)   try:     return str(eval(code, scope))   except SyntaxError:     exec code in scope     return ''      lines = [] for line in fileinput.input():   lines.append(line) text = ''.join(lines) print field_pat.sub(replacement, text)現在編輯兩個文件，通過調用這個腳本來處理： cat > magnus.txt [name = 'Magnus Lie Hetland' ] [email = '[email protected]' ] [language = 'python' ] cat > template.txt [import time] Dear [name]. I would like to learn how to program. I hear you use the [language] a lot. Please help me to learn Oscar 現在來調用： python templates.py magnus.txt template.txt 結果： Dear Magnus Lie Hetland. I would li? to learn how to program. I hear you use the python a lot. Please help me to learn Oscar templates.py腳本把template.txt中[]定義的變量替換成了magnus.txt中定義好的值。