Group and stack tuples
I'm just starting with Python, and I can't figure out how to group tuples.
F开发者_JAVA技巧or instance, I have tuple1=("A", "B", "C")
and tuple2=("1","2","3")
. I want to combine these into a list, grouped by the first tuple. I want it to appear stacked, as in A1 A2 A3 on one line, and B1 B2 B3 on the next line.
I can make them print concatenated, but I can't figure out how to stack them nicely.
>>> t1 = ("A", "B", "C")
>>> t2 = ("1", "2", "3")
>>> [x + y for x in t1 for y in t2]
['A1', 'A2', 'A3', 'B1', 'B2', 'B3', 'C1', 'C2', 'C3']
>>> [[x + y for y in t2] for x in t1]
[['A1', 'A2', 'A3'], ['B1', 'B2', 'B3'], ['C1', 'C2', 'C3']]
>>> x = _ # assign x to the last value
>>> for row in x:
... print " ".join(row)
...
A1 A2 A3
B1 B2 B3
C1 C2 C3
>>> for x in t1:
... for y in t2:
... print x + y, # notice the comma, special print-statement syntax
... print
A1 A2 A3
B1 B2 B3
C1 C2 C3
The [..]
are used here as list comprehensions.
I'm not exacly sure what your problem is precisely, but do you mean the following?
for x in ("A", "B", "C"):
print [x + y for y in ("1", "2", "3")]
What do you mean by stacked?
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