[5 min python] 內建函數：Template

import string

# 創建一個模板字符串

template = string.Template("Hello, ${name}! Your balance is $${balance}.")

# 定義替換的值

values = {"name": "Alice", "balance": 1000}

# 使用substitute方法替換占位符

result = template.substitute(values)

print(result)

# 輸出：Hello, Alice! Your balance is $1000.

# 使用safe_substitute方法替換占位符，如果找不到占位符，則保留它們

result2 = template.safe_substitute(values)

print(result2)

# 輸出：Hello, Alice! Your balance is $1000.

# 如果有未提供的值，safe_substitute 也會保留占位符

values2 = {"name": "Bob"}

result3 = template.safe_substitute(values2)

print(result3)

# 輸出：Hello, Bob! Your balance is $${balance}.

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