String template: a simpler alternative and a string template alternative

String template: a simpler alternative and a string template alternative

The introduction of the new string Template object makes the string module re-active. The Template object has two methods: substitute () and safe_substitute (). the former is more rigorous. when the key is missing, it will report a KeyError exception, while the latter directly displays the string intact when the key is missing.

>>> From string import Template
>>> S = Template ('there are $ {howation }$ {lang} Qutotation symbols ')
>>> Print s. substitute (lang = 'python', howute = 3)
There are 3 Python Qutotation Symbols

 

>>> Print s. safe_substitute (lang = 'python ')

There are $ {howmany} Python QuotationSymbols

 

 

 

This article is excerpted from python core programming version 2 page: 179.

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