# Clean and standardise a list of phone numbers
 
def clean_numbers(nlist):
    newlist = []
    for x, ins in enumerate(nlist):
        outs, x = "", -1
        while len(outs) < 10:
            if ins[x].isdigit():
                outs = ins[x] + outs
            x -= 1
        newlist.append("+92" + outs)
    return newlist
 
 
number_list = [' 03336482191', '3017651141', ' 0335-7588669', '923009772069']
print(clean_numbers(number_list))
 
# Output:
# ['+923336482191', '+923017651141', '+923357588669', '+923009772069']