How to make the next 'for' loop continue loop from previous one through dictionary?-CodePudding

If the input data is a list, it works properly

list_data = [7,10,9,20,2,5,15,6,25,2,8,17,23,9,24,45,3,22,6,20,4]
pos_1 = 0
pos_2 = 0
for i in range(len(list_data)):
    if list_data[i] >= 25:
        pos_1 = i
        break
print(f"Position1 which has value greater than equal to 25: {pos_1}")
for i in range(pos_1 1,len(list_data)):
    if list_data[i] >= 25:
        pos_2 = i
        break
print(f"Position2 which has value greater than equal to 25: {pos_2}")

The output (the 2nd for loop will not repeat the 1st for loop)

Position1 which has value greater than equal to 25: 8
Position2 which has value greater than equal to 25: 15

But if the data is a dictionary like this

dic_data = {1: 10, 3: 20, 6: 15, 8: 25, 11: 17, 12: 23, 14: 24, 15: 45, 17: 22, 19: 20}
index_1 = 0
for i in range(len(dic_data)):
    if(dic_data.values() >= 25):
        pos_1 = dic_data.keys()
        index_1 = i
        break
print(f"Position1 which has value greater than equal to 25: {pos_1}")

for i in range(index_1 1,len(dic_data)):
    if(dic_data.values() >= 25):
        pos_2 = dic_data.keys()
        break
print(f"Position2 which has value greater than equal to 25: {pos_2}")

Of course it must be an error

How to handle with the dictionary data? (Both of them aren't my actual code, it's just an example)

CodePudding user response：

You can use an iterator variable with the iter() function:

dic_data = {1: 10, 3: 20, 6: 15, 8: 25, 11: 17, 12: 23, 
            14: 24, 15: 45, 17: 22, 19: 20}

iData = iter(enumerate(dic_data.values()))

for i,value in iData:
    if (value >= 25):
        pos_1 = i
        break
print(f"Position1 which has value greater than equal to 25: {pos_1}")

for i,value in iData:
    if(value >= 25):
        pos_2 = i
        break
print(f"Position2 which has value greater than equal to 25: {pos_2}")

output:

Position1 which has value greater than equal to 25: 3
Position2 which has value greater than equal to 25: 7

Note that you cannot access a dictionary by a positional index, so the output has limited practical use

CodePudding user response：

The .keys() and .values() represents the whole list of keys or values, you can't do anything on it regarding comparison or index. You need to iterate on dict's pairs : items

dic_data = {1: 10, 3: 20, 6: 15, 8: 25, 11: 17, 12: 23, 14: 24, 15: 45, 17: 22, 19: 20}
index_1, pos_1, pos_2 = 0, 0, 0
for idx, (k, v) in enumerate(dic_data.items()):
    if v >= 25:
        pos_1 = k
        index_1 = idx
        break
print(f"Position1 which has value greater than equal to 25: {pos_1}")

for idx, (k, v) in enumerate(list(dic_data.items())[index_1   1:]):
    if v >= 25:
        pos_2 = k
        break
print(f"Position2 which has value greater than equal to 25: {pos_2}")

Position1 which has value greater than equal to 25: 8
Position2 which has value greater than equal to 25: 15