python lists (snippet)

Python example 'python lists'. This snippet creates a list and then does some modification.

python lists

Python beginners example: python lists

#!/usr/bin/python

jvm_langs = ['Java', 'Jython', 'Groovy', 'Scala', 'Jruby']

#How many JVM langs do you know ?
print('I know of ', jvm_langs.__len__(), 'langs that can run on the JVM')

#It's not a good idea to directly us __xxx__ methods
#A better way is. Remember there is usually a top level function which  
#is the idoimatic way to access the __xxx__method
print('I know of ', len(jvm_langs), 'langs that can run on the JVM')

print('Oops I forgot Clojure')
jvm_langs.append('Clojure')

#Let's iterate across the list
for lang in jvm_langs:
  print(lang)

#Can we get the 3rd element of the list ?
print("The 3rd JVM language is ", jvm_langs[2])
print("The first 3 JVM languages are ", jvm_langs[:3])
print("The 2nd to 4th JVM languages are ", jvm_langs[1:4])

print("let's sort these languages")
jvm_langs.sort()
print(jvm_langs)

Useful links

• Learn Python: https://pythonbasics.org
• Download Python: https://python.org