Create a list of strings with consecutive numbers appended

Question

I'm sure there must e an easy way to do this: I want to create a list which will eventually become column names for a DataFrame. There will be 13 columns, each representing a period in time, called "Period n", where n is the period number. I think there's probably a way to build this list via loop, but I will show what I tried to do:

col_no = list(range(1,14))
col_name = ['Period' for n in range (1,14)]
col_list = col_name + col_no

print(col_list)

['Period',
 'Period',
 'Period',
 'Period',
 'Period',
 'Period',
 'Period',
 'Period',
 'Period',
 'Period',
 'Period',
 'Period',
 'Period',
 1,
 2,
 3,
 4,
 5,
 6,
 7,
 8,
 9,
 10,
 11,
 12,
 13]

Then I tried:

col_list = list(zip(col_name + col_no))
print(col_list)

[('Period',),
 ('Period',),
 ('Period',),
 ('Period',),
 ('Period',),
 ('Period',),
 ('Period',),
 ('Period',),
 ('Period',),
 ('Period',),
 ('Period',),
 ('Period',),
 ('Period',),
 (1,),
 (2,),
 (3,),
 (4,),
 (5,),
 (6,),
 (7,),
 (8,),
 (9,),
 (10,),
 (11,),
 (12,),
 (13,)]

Basically, I just wanted an easily generated list that reads "Period 1", "Period 2", etc. I'm pretty new to Python, and pretty stumped.Thanks in advance

Answer 1

You can concatenate them (the number and the word Period) together while the loop iterates.

Python 3.6+

print([f'Period {i}' for i in range(1, 14)])

Python 2.7+

print(['Period {}'.format(i) for i in range(1, 14)])