pandas expand alphanumeric characters to iterate-CodePudding

I have a list with alphanumeric characters like as shown below

l1 = ['G1','L1']

I would like to know whether we have something like below

for i in range(l1):  #this doesn't work because range is only for numeric values
for i in range(G1:L1): #this also doesn't work

However, I want the i value at each run to change from G1to H1 to I1 to J1 to K1 to L1

CodePudding user response：

Range always expects a number and cannot work with strings.
However, you can use the built-in ord() function to convert letters to numbers and then use the chr() function to convert them back from numbers to ASCII characters.

Code

a = [chr(c) '1' for c in range(ord('G'), ord('M'))]
print(a)

Output

['G1', 'H1', 'I1', 'J1', 'K1', 'L1']

Update: Solution for double characters.

Doing it for double characters is a little more complicated, but this StackOverflow answer has a solution to that. You can simply use the from_excel() and to_excel() functions from that answer and replace them in my above code as follows.

Code

a = [to_excel(i) for i in range(from_excel('G'), from_excel('AG'))]
print(a)

Output

['G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'AA', 'AB', 'AC', 'AD', 'AE', 'AF']

CodePudding user response：

You can use:

from openpyxl.utils import coordinate_to_tuple, get_column_letter

def excel_range(start, end):
    t1 = coordinate_to_tuple(start)
    t2 = coordinate_to_tuple(end)
    rows, cols = zip(t1, t2)
    cells = []
    for r in range(rows[0], rows[1] 1):
        for c in range(cols[0], cols[1] 1):
            cells.append(f'{get_column_letter(c)}{r}')
    return cells

cells = excel_range('AA1', 'AC4')

Output:

>>> cells
['AA1',
 'AB1',
 'AC1',
 'AA2',
 'AB2',
 'AC2',
 'AA3',
 'AB3',
 'AC3',
 'AA4',
 'AB4',
 'AC4']