how to prevent a for loop from overwriting a dictionary?

how to prevent a for loop from overwriting a dictionary?

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how to prevent a for loop from overwriting a dictionary?
Tag : python , By : Derek
Date : January 11 2021, 05:14 PM

may help you . I am creating a dictionary for a JSON file, through the use of a for loop. However my for loop overwrites the entries
x = zip(name, hobbies, age)
for n,h,a in x:
    new_dict[n]={'hobbies': h, 'age': a}


for i in range(len(name)):


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PHP prevent foreach loop from overwriting object

Tag : php , By : Guy Kastenbaum
Date : March 29 2020, 07:55 AM
will help you The reason for the "overwriting" is $tempChild = $child;.
That will not deep copy the contents of $child but make both $tempChild and $child point towards the same data structure, which obviously isn't desirable in this case.
$tempChild = clone $child;

Why is this dictionary overwriting itself during for loop?

Tag : python-2.7 , By : Steve M
Date : March 29 2020, 07:55 AM
This might help you If you notice in your code, in the second for loop you have filtered_dict[date_key] = {}. This resets the value of filtered_dict[date_key] instead of allowing you to add to it.
input_dict = function_to_get_input_dict()
filtered_dict = {}
for metric in input_dict['data']:
    for day in metric['values']:
        parsed_date = parser.parse(day['end_time'])
        date_key = parsed_date.strftime('%m/%d/%Y')
        filtered_dict[date_key] = {}
        filtered_dict[date_key]['Total %s' % metric['title']] = 0
        for k, v in day['value'].iteritems():
            filtered_dict[date_key]['%s : %s' % (metric['title'], k)] = v
            filtered_dict[date_key]['Total %s' % metric['title']] += v
pprint(filtered_dict) #debug

How Do you prevent overwriting of data in a Dictionary through a for loop

Tag : python , By : Dave M
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , There are two places you have issues (as the other answer also indicates) -
for domain in dDomainSeqSum.keys():# CHANGE TO COMPRESS FILE
    for pdb in dDomainSeqSum[domain]:#add sws of a pdb in a variable and later add that variable to the domain thing
        pdb2 = pdb[:4] #you do not need to convert to list for indexing and you can slice the first four characters off.
        for i in range(len(PDBSum)): #make pdb3 search and then compare to the pdb stored
            if pdb in PDBSum[i]:
                if "SWS_ID" in PDBSum[i]:
                    line = PDBSum[i].split()

Prevent Python For Loop from overwriting dictionary

Tag : python , By : nobodyzzz
Date : March 29 2020, 07:55 AM
will be helpful for those in need index in int_index = "int_index " + str(index + 1) will always be the same value as after first loop it's value is constant. Hence data is being overwritten.

intersections = {}
index = 0

for a, b in combinations(zones.values(), 2):
  a_geom = a['location']
  b_geom = b['location']
  if a_geom.intersects(b_geom) == True:
    int_index = "int_index " + str(index + 1)
    int_geometry = a_geom.intersection(b_geom)
    int_area = round((a_geom.intersection(b_geom).area),2)
    int_perimeter = round((a_geom.intersection(b_geom).length),2)
    intersections[int_index] = {
      'geometry' : int_geometry,
      'attributes' : {
        'area' : int_area,
        'perimeter' : int_perimeter,
    index += 1


For loop is overwriting dictionary values in list

Tag : python , By : besn
Date : March 29 2020, 07:55 AM
seems to work fine Try this code. Each device was trying to edit the same copy of a dictionary.
listofdevices = []

def begin():
    with open("outputfromterminal", 'r') as f:
        contents = f.read().split(',')[1:]

    for line in contents:
        # do some text stripping
        line = line.split(' ')

        device =  { 'ip': line[0],
                    'mac': line[1],
                    'username': 'admin',
                    'password': [],
                    'device type': '',

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