what is enumerate in python
languages = ['Python', 'C', 'C++', 'C#', 'Java']
#Bad way
i = 0 #counter variable
for language in languages:
print(i, language)
i+=1
#Good Way
for i, language in enumerate(languages):
print(i, language)
0
0
for index,char in enumerate("abcdef"):
print("{}-->{}".format(index,char))
0-->a
1-->b
2-->c
3-->d
4-->e
5-->f
Thank you!
0
0
4
10
np.r_[1:10, 15, 17, 50:100]
array([ 1, 2, 3, 4, 5, 6, 7, 8, 9, 15, 17, 50, 51, 52, 53, 54, 55,
56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72,
73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89,
90, 91, 92, 93, 94, 95, 96, 97, 98, 99])
Thank you!
10
0
0
10
df.iloc[:, np.r_[1:10, 15, 17, 50:100]]
Thank you!
10
0
3
1
>>> frutas = ["manzanas", "peras", "naranjas"]
>>> for i, fruta in enumerate(frutas):
... print(i, fruta)
0 manzanas
1 peras
2 naranjas
Thank you!
1
0
4
1
for index,subj in enumerate(subjects):
print(index,subj) ## enumerate will fetch the index
0 Statistics
1 Artificial intelligence
2 Biology
3 Commerce
4 Science
5 Maths
Thank you!
1
0
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