Generate a list of names/strings randomly of desired size in python and add it to a dataframe column

Question

I am tying to generate a random list of names from a given set. I have tried two different ways (group_1) and group_2 below, but both times I am not able to generate a list of names as desired. While group_1 makes each character into a separate element of the lsit, group_2 just makes a single element list. while i need list of 342 elemetns.

code:

import random
first_names=('John','mary','hillary')
last_names=('Johnson','Smith','Williams')

group_1=list(" ".join(random.choice(first_names)+" "+random.choice(last_names) for _ in range(342)))
group_2 = [" ".join(random.choice(first_names)+" "+random.choice(last_names) for _ in range(342))]

print(group_1)
print(len(group_1))
print(group_2)
print(len(group_2))

Djaouad · Accepted Answer · 2019-09-16 15:31:24Z

2

The unnecessary " ".join is what's causing this problem, you can just omit it (since you already have + " " +) and use a list comprehension:

group = [random.choice(first_names) + " " + random.choice(last_names) for _ in range(342)]

print(len(group))
print(group)

Output:

342
['hillary Johnson', 'John Williams', 'John Johnson', 'mary Williams', 'mary Smith', ...]

answered Sep 16, 2019 at 15:31

Djaouad

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Comments

Jop Knoppers · Accepted Answer · 2019-09-16 15:31:50Z

0

If I understand you correctly you want a list like the one shown below:

hillary Smith
mary Johnson
John Johnson
John Williams
hillary Smith
......

This code will provide a list like that,

from random import randrange

first_names=('John','mary','hillary')
last_names=('Johnson','Smith','Williams')

names = [first_names[randrange(len(first_names))] + " " + last_names[randrange(len(last_names))] for _ in range(342)]
print (names)

answered Sep 16, 2019 at 15:31

Jop Knoppers

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