如何并列打印元组列表

Question

Just new to Python. And try to learn how I can print a list of tuples side by side. Let's say I have a list of tuple with a format of:

myList =[('05', 5), ('08', 3), ('12', 5)]

And I would like to have an output like:

05 5
08 3
12 5

without single quotes. What is the best way to do that?

Answer 1

It is rather simple, you can, for instance, unpack the tuple in a for loop:

myList =[('05', 5), ('08', 3), ('12', 5)]

for a, b in myList:  # <-- this unpacks the tuple like a, b = (0, 1)
    print(a, b)

output:

05 5
08 3
12 5

Answer 2

Just loop over it.

for value in myList:
    print(value[0], value[1])

Answer 3

You can use unpacking, a feature in Python3:

myList =[('05', 5), ('08', 3), ('12', 5)]
for a, *b in myList:
  print(a, ' '.join(map(str, b)))

This way, if you have more than three elements in the tuple, you will not have an ToManyValuesToUnpack error raised.

Output:

05 5
08 3
12 5

For example:

myList =[('05', 5, 10, 3, 2), ('08', 3, 4), ('12', 5, 2, 3, 4, 5)]
for a, *b in myList:
   print(a, ' '.join(map(str, b)))

Output:

05 5 10 3 2
08 3 4
12 5 2 3 4 5

Answer 4

python-3.x adds automatically a space between elements in the print statement. In python-3.x , we can use iterable unpacking:

for row in myList:
    print(*row)

producing:

>>> for row in myList:
...     print(*row)
... 
05 5
08 3
12 5

In case you want another separator (eg a pipe | ), you can set the sep attribute:

for row in myList:
    print(*row, sep='|')

this produces:

>>> for row in myList:
...     print(*row,sep='|')
... 
05|5
08|3
12|5

This approach can handle any number of elements in the tuple (eg a list of 3-tuples), and in case the tuples have different lengths (eg [(1,2),(3,4,5)] ), it will print the 3-tuples with three columns and the 2-tuples with two columns.

Answer 5

for i, j in myList:
    print(i, j)

Answer 6

If you want a simple solution for a fixed tuple size of two, then this works:

for tup in myList:
    print(tup[0], tup[1])

If, though, you would prefer to print varying length tuples without changing your code, you could do something like this:

for tup in myList:
    print(' '.join(map(str,tup)))

Answer 7

You can unpack the values in a iterable, which works for more than two elements in tuple as well.

myList =[('05', 5, 3), ('08', 3), ('12', 5)]

for a in myList:
    print(*a, sep=" ")

You can use a different seperator, space is the default one.