Using element of list both as string and integer

Question

Is there a way to use the elements of a string-list first as strings and then as int?

l = ['A','B','C']

for n in l:
    use n as string (do some operations)
    convert n to int(element of NG)
    use n as int

I tried to Play around with range/len but I didnt come to a solution.

Edit2:

This is what I have:

import pandas as pd
import matplotlib.pyplot as plt

NG = ['A','B','C']

l = [1,2,3,4,5,6]
b = [6,5,4,3,2,1]

for n in NG:
    print(n)
    dflist = []
    df = pd.DataFrame(l)
    dflist.append(df)
    df2 = pd.DataFrame(b)
    dflist.append(df2)
    df = pd.concat(dflist, axis = 1)
    df.plot()

The Output are 3 figures that look like this:

But I want them to be in one figure:

import pandas as pd
import matplotlib.pyplot as plt

NG = ['A','B','C']

l = [1,2,3,4,5,6]
b = [6,5,4,3,2,1]

for n in NG:
    print(n)
    dflist = []
    df = pd.DataFrame(l)
    dflist.append(df)
    df2 = pd.DataFrame(b)
    dflist.append(df2)
    df = pd.concat(dflist, axis = 1)
    ax = plt.subplot(6, 2, n + 1)
    df.plot(ax = ax)

This code works, but only if the list NG is made out of integers [1,2,3]. But I have it in strings. And I Need them in the Loop.

what you mean by *"first as strings and then as int"* ? Can you post a sample o/p ? — Vikas Periyadath, Apr 09 '18 at 07:07
Do you need the intergers equivalent to the ascii table? That mean A = 65 — Kruupös, Apr 09 '18 at 07:15
Sorry, I made it unclear. First I Need the string of the list. Then I Need the string's index for the plot. — Artur Müller Romanov, Apr 09 '18 at 07:35
Possible duplicate of [Accessing the index in Python 'for' loops](https://stackoverflow.com/questions/522563/accessing-the-index-in-python-for-loops) — Jeyekomon, Apr 09 '18 at 07:54

score 1 · Answer 1 · answered Apr 09 '18 at 07:34

1

Here is my 2 cents:

>>> for n in l:
...     print ord(n)
...     print n
... 
65
A
66
B
67
C

To convert back to char

>>> chr(65)
'A'

answered Apr 09 '18 at 07:34

Devidas

2,479
9
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Is there a way to convert the strings to their index? – Artur Müller Romanov Apr 09 '18 at 07:40
care to explain? I didn't get your question. – Devidas Apr 09 '18 at 07:41
I Need the string as well as its index (of the list). Example: I Need the 'B' as well as its index -> 2 – Artur Müller Romanov Apr 09 '18 at 07:42
>>> for index,c in enumerate(str): ... print(c,index) ... ('H', 0) ('E', 1) ('L', 2) ('P', 3) >>> – Devidas Apr 09 '18 at 07:49
you can use list (i.e. l) as well instead of string(i.e. str) – Devidas Apr 09 '18 at 07:50

score 1 · Accepted Answer · answered Apr 09 '18 at 07:43

1

How to access both the element of list and its index?

That is the real question as I understood mainly from this comment. And it is a pretty common and straightforward piece of code:

NG = ['A', 'B', 'C']

for i in range(len(NG)):
    print(i)
    print(NG[i])

answered Apr 09 '18 at 07:43

Jeyekomon

2,878
2
27
37

Thanks, that was what I was looking for. Sorry for the poorly written question – Artur Müller Romanov Apr 09 '18 at 07:46

score 0 · Answer 3 · answered Apr 09 '18 at 07:26

I think integer mean here is ascii value of character so you can use again your ascii value to play with characters my solution is you have to type cast your variables like this , and use ord() function to get ascii values

l = ['A','B','C']
for i in range(0,len(l)):
    print("string value is ",l[i])
    # now for integer values
    if type(l[i]) != 'int':
        print("ascii value of this char is ",ord(l[i]))
    else:
        print("already int type go on..")

as because there is no meaning of having a int value of characters , int value of character generally refers as ascii value may be some other formats

score 0 · Answer 4 · answered Apr 09 '18 at 07:27

Use enumerate to iterate both on the indices and the letters.

NG = ['A','B','C']

for i, n in enumerate(NG, 1):
    print(i, n)

Will output:

(1, 'A')
(2, 'B')
(3, 'C')

In your case, because you don't need the letters at all in your loop, you can use the underscore _ to notify coders in your future about what your code do - it uses the len of NG just for the indices.

for i, _ in enumerate(NG, 1):

Using element of list both as string and integer

4 Answers4

To convert back to char