Unable to return index from Series using value match for numeric values
Question:
A pandas Series object is created from a list of numbers and characters, charSeries, copied below for reference.
A random five digit string of characters and numbers, created from the below list, is made:
code_core = Q5YUO
Each character in code_core is iterated through to get the corresponding index:
for character in code_core:
index_tosum = charSeries[charSeries == character].index(0)
This works for all alphabet characters. However for any number an error is returned. In the above core_core, an error is returned for character ‘5’:
return getitem(key)
IndexError: index 0 is out of bounds for axis 0 with size 0
It is found that for 5, or any number,
charSeries[charSeries == character]
is empty. I do not see why this is as 5 is one of the values in the Series below and has an index of 5.
What is the error in my code or my approach?
0 0
1 1
2 2
3 3
4 4
5 5
6 6
7 7
8 8
9 9
10 B
11 C
12 D
13 F
14 G
15 H
16 J
17 K
18 L
19 M
20 N
21 P
22 Q
23 R
24 S
25 T
26 V
27 W
28 X
29 Y
30 Z
Answers:
IIUC use next with iter with default value if no match, also if mixed numeric and string values convert them to strings by astype:
code_core = 'Q5YUO'
for character in code_core:
out = next(iter(charSeries.index[charSeries.astype(str) == character]), 'no match')
print (out)
22
5
29
no match
no match
A pandas Series object is created from a list of numbers and characters, charSeries, copied below for reference.
A random five digit string of characters and numbers, created from the below list, is made:
code_core = Q5YUO
Each character in code_core is iterated through to get the corresponding index:
for character in code_core:
index_tosum = charSeries[charSeries == character].index(0)
This works for all alphabet characters. However for any number an error is returned. In the above core_core, an error is returned for character ‘5’:
return getitem(key)
IndexError: index 0 is out of bounds for axis 0 with size 0
It is found that for 5, or any number,
charSeries[charSeries == character]
is empty. I do not see why this is as 5 is one of the values in the Series below and has an index of 5.
What is the error in my code or my approach?
0 0
1 1
2 2
3 3
4 4
5 5
6 6
7 7
8 8
9 9
10 B
11 C
12 D
13 F
14 G
15 H
16 J
17 K
18 L
19 M
20 N
21 P
22 Q
23 R
24 S
25 T
26 V
27 W
28 X
29 Y
30 Z
IIUC use next with iter with default value if no match, also if mixed numeric and string values convert them to strings by astype:
code_core = 'Q5YUO'
for character in code_core:
out = next(iter(charSeries.index[charSeries.astype(str) == character]), 'no match')
print (out)
22
5
29
no match
no match