My code is
index = 0
for key in dataList[index]:
print(dataList[index][key])
Seems to work fine for printing the values of dictionary keys for index = 0.
But for the life of me I can't figure out how to put this for loop inside a for loop that iterates through the unknown number of dictionaries in dataList
You could just iterate over the indices of the range of the len of your list:
dataList = [{'a': 1}, {'b': 3}, {'c': 5}]
for index in range(len(dataList)):
for key in dataList[index]:
print(dataList[index][key])
or you could use a while loop with an index counter:
dataList = [{'a': 1}, {'b': 3}, {'c': 5}]
index = 0
while index < len(dataList):
for key in dataList[index]:
print(dataList[index][key])
index += 1
you could even just iterate over the elements in the list directly:
dataList = [{'a': 1}, {'b': 3}, {'c': 5}]
for dic in dataList:
for key in dic:
print(dic[key])
It could be even without any lookups by just iterating over the values of the dictionaries:
dataList = [{'a': 1}, {'b': 3}, {'c': 5}]
for dic in dataList:
for val in dic.values():
print(val)
Or wrap the iterations inside a list-comprehension or a generator and unpack them later:
dataList = [{'a': 1}, {'b': 3}, {'c': 5}]
print(*[val for dic in dataList for val in dic.values()], sep='\n')
the possibilities are endless. It's a matter of choice what you prefer.
You can easily do this:
for dict_item in dataList:
for key in dict_item:
print dict_item[key]
It will iterate over the list, and for each dictionary in the list, it will iterate over the keys and print its values.
use=[{'id': 29207858, 'isbn': '1632168146', 'isbn13': '9781632168146', 'ratings_count': 0}]
for dic in use:
for val,cal in dic.items():
print(f'{val} is {cal}')
def extract_fullnames_as_string(list_of_dictionaries):
return list(map(lambda e : "{} {}".format(e['first'],e['last']),list_of_dictionaries))
names = [{'first': 'Zhibekchach', 'last': 'Myrzaeva'}, {'first': 'Gulbara', 'last': 'Zholdoshova'}]
print(extract_fullnames_as_string(names))
#Well...the shortest way (1 line only) in Python to extract data from the list of dictionaries is using lambda form and map together.
"""The approach that offers the most flexibility and just seems more dynamically appropriate to me is as follows:"""
def extract_fullnames_as_string(list_of_dictionaries):
result = ([val for dic in list_of_dictionaries for val in
dic.values()])
return ('My Dictionary List is ='result)
dataList = [{'first': 3, 'last': 4}, {'first': 5, 'last': 7},{'first':
15, 'last': 9},{'first': 51, 'last': 71},{'first': 53, 'last': 79}]
print(extract_fullnames_as_string(dataList))
"""This way, the Datalist can be any format of a Dictionary you throw at it, otherwise you can end up dealing with format issues, I found. Try the following and it will still works......."""
dataList1 = [{'a': 1}, {'b': 3}, {'c': 5}]
dataList2 = [{'first': 'Zhibekchach', 'last': 'Myrzaeva'}, {'first':
'Gulbara', 'last': 'Zholdoshova'}]
print(extract_fullnames_as_string(dataList1))
print(extract_fullnames_as_string(dataList2))
Another pythonic solution is using collections module.
Here is an example where I want to generate a dict containing only 'Name' and 'Last Name' values:
from collections import defaultdict
test_dict = [{'Name': 'Maria', 'Last Name': 'Bezerra', 'Age': 31},
{'Name': 'Ana', 'Last Name': 'Mota', 'Age': 31},
{'Name': 'Gabi', 'Last Name': 'Santana', 'Age': 31}]
collect = defaultdict(dict)
# at this moment, 'key' becomes every dict of your list of dict
for key in test_dict:
collect[key['Name']] = key['Last Name']
print(dict(collect))
Output should be:
{'Name': 'Maria', 'Last Name': 'Bezerra'}, {'Name': 'Ana', 'Last Name': 'Mota'}, {'Name': 'Gabi', 'Last Name': 'Santana'}
had a similar issue, fixed mine by using a single for loop to iterate over the list, see code snippet
de = {"file_name":"jon","creation_date":"12/05/2022","location":"phc","device":"s3","day":"1","time":"44692.5708703703","year":"1900","amount":"3000","entity":"male"}
se = {"file_name":"bone","creation_date":"13/05/2022","location":"gar","device":"iphone","day":"2","time":"44693.5708703703","year":"2022","amount":"3000","entity":"female"}
re = {"file_name":"cel","creation_date":"12/05/2022","location":"ben car","device":"galaxy","day":"1","time":"44695.5708703703","year":"2022","amount":"3000","entity":"male"}
te = {"file_name":"teiei","creation_date":"13/05/2022","location":"alcon","device":"BB","day":"2","time":"44697.5708703703","year":"2022","amount":"3000","entity":"female"}
ye = {"file_name":"js","creation_date":"12/05/2022","location":"woji","device":"Nokia","day":"1","time":"44699.5708703703","year":"2022","amount":"3000","entity":"male"}
ue = {"file_name":"jsdjd","creation_date":"13/05/2022","location":"town","device":"M4","day":"5","time":"44700.5708703703","year":"2022","amount":"3000","entity":"female"}
d_list = [de,se,re,te,ye,ue]
for dic in d_list:
print (dic['file_name'],dic['creation_date'])
