Python Grouping Data Using Itertools Groupby

In this Python tutorial we will go over how to group data elements in different ways and get counts for those different data elements, etc. using the itertools module groupby function.

[RyanNoonan]

Below is another way to get a tally count and see the unique values in a data set.

# create tally count using dictionary
l = ['a', 'a', 'b', 'a', 'b', 'c', 'a', 'a', 'b', 'c', 'b', 'c']
d = {}
for i in l:
if i not in d:
d[i] = 1
else:
d[i] += 1
print(d)
# prints {'a': 5, 'b': 4, 'c': 3}

# find unique values
print(set(l))
{'c', 'b', 'a'}

[shutingzhang]

Thanks bro what a great tutorial! Very clear

[hypocritekiller]

I was looking for group by then sort by count descending, now I can do it easily. Thanks a lot.

[sandeepnimmagadda]

Thanks Ryan, you did a great job explaining it. Very helpful

[rishabhjain]

Thanks..It was helpful to understand groupby().

[stoneskull]

thank you for the video. it helped a lot.

[takosenpai]

Thanks for the tutorial, very helpful!

[swadhikarc]

Nice video and great explanation. Just increase the font size. this is difficult to see

[ankitthakar]

Nice video to understand groupby funcion

[oddnumber]

i learnt sth and after a week i forgot it..have you any advice folk?

[udhayprakashpethakamsetty]

spyder IDE can also be installed using pip:
pip install -U spyder