Handle KeyError in Python

Question

How can i handle KeyError with if's? Depending the error, handling the error from a diferrent way.

speed_uhc_team = counts_stats['games']['SPEED_UHC']['modes']['team_normal']
speed_uhc_solo = counts_stats['games']['SPEED_UHC']['modes']['solo_normal']

What i want is if the key team_normal don't exist in the dictionary assign a value of my choice to that key.

But when the key team_normal exists, just assign the key value.

if 'team_normal' not in counts_stats['games']['SPEED_UHC']['modes'].keys(): — chitown88
– chitown88, Commented Oct 18, 2021 at 11:51
i don't understand - you watn to assign a value in both cases. So what's the difference? — Psytho
– Psytho, Commented Oct 18, 2021 at 11:54
@Psytho if the value don't exist on the dict assign a value of my choice — shadowoff09
– shadowoff09, Commented Oct 18, 2021 at 11:59

Serge Ballesta · Accepted Answer · 2021-10-18 12:04:39Z

3

If only the last key can be absent, you can use get:

speed_uhc_team = counts_stats['games']['SPEED_UHC']['modes'].get('team_normal',
                                                                 default_value)

If you want to hangle any key error, you should use a try block:

try:
    speed_uhc_team = counts_stats['games']['SPEED_UHC']['modes']['team_normal']
except KeyError:
    speed_uhc_team = default_value

answered Oct 18, 2021 at 12:04

Serge Ballesta

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chitown88 · Accepted Answer · 2021-10-18 11:53:23Z

1

Just check if the key is present:

if 'team_normal' not in counts_stats['games']['SPEED_UHC']['modes'].keys():
    speed_uhc_team = my_choice_value
    
else:
    speed_uhc_team = counts_stats['games']['SPEED_UHC']['modes']['team_normal']

answered Oct 18, 2021 at 11:53

chitown88

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Jakub Szlaur · Accepted Answer · 2021-10-18 11:53:16Z

0

This should do it:

d = { "team_solo": True}

if "team_normal" in d:
    print("I found team_normal in d!")

if "team_solo" in d:
    print("I found team_solo in d!")

answered Oct 18, 2021 at 11:53

Jakub Szlaur

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Origin · Accepted Answer · 2021-10-18 11:53:48Z

0

try:
  speed_uhc_team = counts_stats['games']['SPEED_UHC']['modes']['team_normal']
except KeyError:
  speed_uhc_team = counts_stats['games']['SPEED_UHC']['modes']['other_key']

answered Oct 18, 2021 at 11:53

Origin

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