python - Spacing inbetween letters and numbers -

so basically, i'm trying write filter can separate numbers , letters dictionary , have space inbetween them. instance 12346 s 12346 q.

def check_if_works():     dict_info = {}     dict_info['1234'] = "test"     dict_info['12456s'] = "test"     dict_info['12456q'] = "test"     dict_info['12456b'] = "test"     dict_info['123456'] = "test"     dict_info['asdftes'] = "test"     dict_info['asdftess'] = "test"     dict_info['asdftessd'] = "test"     arr = []     key,value in dict_info.iteritems():         if key.isalpha() or key.isdigit():             pass         #print key         else:             print key   

no need list of dictionaries, want fill , dump new_dict directly.

also, there's no need try/except (which not work because str.isalpha() never throw exceptions), should combine checks test contains letters or numbers (isalnum()) , not contain either letters (isalpha()) or numbers (isdigit()).

then don't write file once per iteration step on original dictionary, once in end dump entire result dictionary.

new_dict = {}  key,value in dict_info.iteritems():     check = key.isalnum() , not (key.isalpha() or key.isdigit())      new_dict[insert_spaces(key)] = value     print (key, ":", value)  open('output.json', 'wb') outfile:     json.dump(new_dict, outfile, indent=4) 

the function insert_spaces need insert space between digit+letter or letter+digit looks this:

import re def insert_spaces(key):     return re.sub(r'(\d)(\d)', r"\1 \2", re.sub(r'(\d)(\d)', r"\1 \2", key)) 

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alternatively replace whole code dictionary comprehension (since python 2.7):

with open('output.json', 'wb') outfile:     json.dump({ insert_spaces(key): dict_info[key] key in dict_info if key.isalnum() , not (key.isalpha() or key.isdigit()) }, outfile, indent=4) 

or nicer formatted extracting check condition lambda function:

check_key = lambda key: key.isalnum() , not (key.isalpha() or key.isdigit()) open('output.json', 'wb') outfile:     json.dump({ insert_spaces(k): dict_info[k] k in dict_info if check_key(k) },                outfile, indent=4)