Passing an specific error python

Question

I am trying to pass a specific key error.by this two.

try:    
    per_visit_large_store = 100 * dic_data[mac]['Retail Store']['No. of visit to large store']/float(dic_data[mac]['Total no. of walk_in'])
except KeyError: 'Retail Store'
    pass

and

try:    
    per_visit_large_store = 100 * dic_data[mac]['Retail Store']['No. of visit to large store']/float(dic_data[mac]['Total no. of walk_in'])
except KeyError: 'Retail Store':
    pass

both of this raises Indentation and syntax error respectively. What exactly I am doing wrong? I am using python 2.7

Are you trying to only catch the KeyError if the key is 'Retail Store'? — Daniel Roseman, Jul 04 '16 at 11:19

TerryA · Answer 1 · 2016-07-04T11:27:01.447

0

The correct syntax is:

try:
    ...
except KeyError:
    pass

If you want to catch a specific key then you need to check the message of the error:

d = {'a':1, 'b':2}
try:
    d['c']
except KeyError as e:
    if e.message == 'c':
        blah
    else:
        raise KeyError, e

This will only continue the code if the key is 'c'. If it is not, then the error is raised.

edited Jul 04 '16 at 11:27

answered Jul 04 '16 at 11:18

TerryA

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That will pass all the key errors I want to pass thi specific one. – Jul 04 '16 at 11:19
HOw exactly wait I am putting my try part too. – Jul 04 '16 at 11:22
@ranadan Wait I misinterpreted: Check my answer now – TerryA Jul 04 '16 at 11:23

Andriy Ivaneyko · Accepted Answer · 2016-07-04T11:26:26.160

0

Syntax is incorrect, it should be:

try:
    # some code there
except KeyError as e:
    caused_key = e.args[0]
    if caused_key == 'Retail Store':
        pass

See more in Python Exception tutorial

Good Luck :)!

edited Jul 04 '16 at 11:26

answered Jul 04 '16 at 11:18

Andriy Ivaneyko

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Will this one pass all the key error or specifically one with `'Retail Store` ?? – Jul 04 '16 at 11:21
@ranadan this would pass all key errors – Andriy Ivaneyko Jul 04 '16 at 11:23
well I was looking for specific one :) – Jul 04 '16 at 11:25
@ranadan see updated answer. – Andriy Ivaneyko Jul 04 '16 at 11:26

Passing an specific error python

2 Answers2