How do I save my print statement in a list? Python [closed]

问题

How do I save my print statement in a list?

for i in range(len(values)):
    for j in range(len(values)):
        print (values[0]+values[i])+values[j]

回答1:

Don't use print if you wanted to add values to a list. Just add them to a list directly:

result = []
for i in range(len(values)):
    for j in range(len(values)):
        result.append(values[0] + values[i] + values[j])

You can loop over values directly here:

result = []
for i in values:
    for j in values:
        result.append(values[0] + i + j)

which can be combined into a list comprehension:

result = [values[0] + i + j for i in values for j in values]

回答2:

You can use a variable to store the result,

result = []
for i in range(len(values)):
    for j in range(len(values)):
        res = (values[0]+values[i])+values[j]
        print res
        result.append(res)

or do the following to slightly optimize code above:

result = []
for i in range(len(values)):
    for j in range(len(values)):
        result.append((values[0]+values[i])+values[j])
        print result[-1]

Better still, you can use a list comprehension to simplify this and create the end result:

result = [values[0] + i + j for i in values for j in values]

You can of course then print these later using a simple

for res in result:
    print res

回答3:

You could use a list comprehension:

results = [values[0] + val_i + val_j for val_i in values for val_j in values]

来源：https://stackoverflow.com/questions/27970483/how-do-i-save-my-print-statement-in-a-list-python

标签

python

list

for-loop

printing