V Vishwanathan <vira...@hotmail.com> writes:
> alert = "Today's forecast for {city}: The temperature will range
> from{low_temperature} "" to ""{high_temperature}{temperature_unit}Conditions
> will be
> {weather_conditions}".format(city,low_temperature,high_temperature,temperature_unit,weather_conditions)
> print(alert)
The ‘str.format’ method accepts positional arguments and keyword
arguments.
When you want to refer to the arguments by name, the method must know
their names; that means passing them to the method as keyword arguments.
> Traceback (most recent call last):
> File "D:\python exercises\uda format1.py", line 6, in <module>
> alert = "Today's forecast for {city}: The temperature will range
> from{low_temperature} "" to ""{high_temperature}{temperature_unit}Conditions
> will be
> {weather_conditions}".format(city,low_temperature,high_temperature,temperature_unit,weather_conditions)
> KeyError: 'city'
Your format string refers to keys (names) that are not found in the
dictionary of keyword arguments — because you passed no keyword
arguments.
Instead, give a keyword argument for each name you want to refer to in
the format string.
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Ben Finney
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