My program generates a random string with a random amount of letters from 10 to 20.
def program():
import random
import sys
x=['q','w','e','r']
y=random.randint(10,20)
for t in range (0,y):
w=random.randint(0,3)
e=x[w]
sys.stdout.write(e)
The program will print a random string like 'wwwweewwqqrrrrwwqqeeqqww'. How would I store this string as a variable?
Store it in a variable instead of writing:
e=''
for t in range (0,y):
w=random.randint(0,3)
e += x[w]
e is an empty variable and each time you add the value x[w] to it.
I would also recommend using print() over sys.stdout.write(e) since you do not need additional imports -such as sys, print() is inbuilt.
In this case can I suggest the use of a tuple for x=['q','w','e','r'] since they are faster. So: x=('q','w','e','r'1)
but if you are going to need to modify this later then this is not an option available to you (since they are immutable).
You could replace your loop with a list comprehension, and use join():
e = ''.join([random.choice(x) for _ in range(0, y)])
Output:
qwewwwereeeqeqww
def program():
import random
x=['q','w','e','r']
y=random.randint(10,20)
mystr=''
for t in range (0,y):
w=random.randint(0,3)
e=x[w]
mystr=mystr+e
If you'd like you can haveprogram() returns the output variable like so:
def program():
import random
import sys
x=['q','w','e','r']
y=random.randint(10,20)
output = ''
for t in range (0,y):
w=random.randint(0,3)
e=x[w]
output+=e
# The print is stored in 'output'
# Return the output
return output
result = program()
An easy way to do this would be to create a new string variable and just use the += operator to concatenate each character onto a new string. Your code could be
def program():
import random
import sys
x=['q','w','e','r']
y=random.randint(10,20)
z = '';
for t in range (0,y):
w=random.randint(0,3)
e=x[w]
z += e;
This code just adds each character to a string variable z in your for loop, and that string value should be stored in z.
something like (haven't tested the program, should work... famous last words).
# imports at start of file, not in def
import random
import sys
# I would never call a def 'program', kind of generic name, avoid
def my_program(): # camel case, PEP-8
x=['q','w','e','r']
z='' # initialize result as an empty string
for _ in range (0, random.randint(10,20)):
z+=x[random.randint(0,3)] # add a letter to string z
return z
"_" is often used for a throw away variable, see What is the purpose of the single underscore "_" variable in Python? In this case the _ is used nowhere.
e = random.choice(x)is much more readable thanw = random.randint(0, 3); e = x[w].return ''.join(random.choices('qwer', k=random.randint(10, 20)))