python - String assignment in a list in a 'for' loop -

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I have a list ['1', '2', '3', '4'] < / Code> and I want to convert it to: ['1.0', '2.0', '3.0', '4.0'] . In the code below, why does the second attempt work and not the first? 

  & gt; & Gt; & Gt; List = ['1', '2', '3', '4'] >> gt; & Gt; For element in the list: ... element = element + '.0' ... & gt; & Gt; & Gt; Print (list) ['1', '2', '3', '4']> gt; & Gt; & Gt; For element in element (lane (list)): ... list [element] = list [element] + '.0' ... ... gt; & Gt; & Gt; Print (list) ['1.0', '2.0', '3.0', '4.0']

element is the local variable and only the current element of the list is specified.

In the second case list [element] is assigned to indicate the current indicator of the element list in the list.


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