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How to Resolve the \'TypeError: String Formatting Mismatch\' Error?
- Patricia ArquetteOriginal
- 2024-10-18 12:08:26644browse
Understanding the TypeError: String Formatting Mismatch
When trying to incorporate placeholders like {0} in string formatting, it's essential to understand the nuances of the formatting method being used. The error message "TypeError: not all arguments converted during string formatting" typically arises when the %-based formatting method is misused.
Old-style % Formatting
The % formatting method employs % codes to specify formatting operations. When formatting a single value, it can be included directly in the string:
<code class="python">'It will cost $%d dollars.' % 95</code>
However, for multiple values, a tuple must be provided:
<code class="python">"'%s' is longer than '%s'" % (name1, name2)</code>
New-style {} Formatting
In contrast, the {} formatting method utilizes {} placeholders and the .format() method. It's crucial to avoid mixing these methods. If the "template" string contains {} placeholders, use .format(), not %.
<code class="python"># Values as method arguments
'It will cost ${0} dollars.'.format(95)
"'{0}' is longer than '{1}'".format(name1, name2)</code>The above is the detailed content of How to Resolve the \'TypeError: String Formatting Mismatch\' Error?. For more information, please follow other related articles on the PHP Chinese website!