TypeError: list indices must be integers or slices, not str
In my case I was trying to change the value of a dict
key but since my dict
was there in a for loop and was getting changed to type list
i was getting the same error.
for value in source_list:
my_dict['my_key']=some_val
dict=list(mydict)
exctraction0 = dict[0]
i resolved it by making sure the type of dict
remains the same by making a deepcopy
and re-initializing
after every iteration
(that is what the use-case was all about).
copy_dict = copy.deepcopy(my_dict)
for value in source_list:
my_dict =copy.deepcopy(copy_dict)
my_dict['my_key']=some_val
dict=list(mydict)
exctraction0 = dict[0]
Follow up on Abdeali Chandanwala answer above (couldn't comment because rep<50) -
TL;DR: I was trying to iterate through a list of dictionaries incorrectly by focusing to iterate over the keys in the dictionary but instead had to iterate over the dictionaries themselves!
I came across the same error while having a structure like this:
{
"Data":[
{
"RoomCode":"10",
"Name":"Rohit",
"Email":"[email protected]"
},
{
"RoomCode":"20"
"Name":"Karan",
"Email":"[email protected]"
}
]
}
And I was trying to append the names in a list like this-
Fixed it by-
First, array_length
should be an integer and not a string:
array_length = len(array_dates)
Second, your for
loop should be constructed using range
:
for i in range(array_length): # Use `xrange` for python 2.
Third, i
will increment automatically, so delete the following line:
i += 1
Note, one could also just zip
the two lists given that they have the same length:
import csv
dates = ['2020-01-01', '2020-01-02', '2020-01-03']
urls = ['www.abc.com', 'www.cnn.com', 'www.nbc.com']
csv_file_patch = '/path/to/filename.csv'
with open(csv_file_patch, 'w') as fout:
csv_file = csv.writer(fout, delimiter=';', lineterminator='\n')
result_array = zip(dates, urls)
csv_file.writerows(result_array)
I had same error and the mistake was that I had added list and dictionary into the same list (object) and when was iterating over the list of dictionaries and hit a list type object then I would get this error since I was trying to access keys within each dictionary.
I had to made sure that I only added dictionary objects to that list