 def first_last6(nums):
  """
  Given an array of ints, return True if 6 appears as either the first or last
  element in the array. The array will be length 1 or more.
  """
  return 6 in [nums[0],nums[-1]]


def same_first_last(nums):
  """
  Given an array of ints, return True if the array is length 1 or more, and the
  first element and the last element are the same.
  """
  return len(nums) > 0 and nums[0] == nums[-1]


def make_pi():
  """
  Return an int array length 3 containing the first 3 digits of pi, {3, 1, 4}.
  """
  return [3,1,4]


def common_end(a, b):
  """
  Given 2 arrays of ints, a and b, return True if they have the same first
  element or they have the same last element. Both arrays will be length 1
  or more.
  """
  return a[0] == b[0] or a[-1] == b[-1]


def sum3(nums):
  """Given an array of ints length 3, return the sum of all the elements."""
  return sum(nums)


def rotate_left3(nums):
  """
  Given an array of ints length 3, return an array with the elements "rotated
  left" so {1, 2, 3} yields {2, 3, 1}.
  """
  return [nums[1], nums[2], nums[0]]

def reverse3(nums):
  """
  Given an array of ints length 3, return a new array with the elements in
  reverse order, so {1, 2, 3} becomes {3, 2, 1}.
  """
  return [nums[2],nums[1],nums[0]]

def max_end3(nums):
  """
  Given an array of ints length 3, figure out which is larger between the
  first and last elements in the array, and set all the other elements to be
  that value. Return the changed array.
  """
  return [nums[0]]*3 if nums[0] >= nums[-1] else [nums[-1]]*3

def sum2(nums):
  """
  Given an array of ints, return the sum of the first 2 elements in the array.
  If the array length is less than 2, just sum up the elements that exist,
  returning 0 if the array is length 0.
  """
   return sum(nums[:2])

def middle_way(a, b):
  """
  Given 2 int arrays, a and b, each length 3, return a new array length 2
  containing their middle elements.
  """
  return [ a[1] , b[1] ]

def make_ends(nums):
  """
  Given an array of ints, return a new array length 2 containing the first
  and last elements from the original array. The original array will be
  length 1 or more.
  """
  return [ nums[0] , nums[-1] ]

def has23(nums):
  """Given an int array length 2, return True if it contains a 2 or a 3."""
  return 2 in nums or 3 in nums

created 4 years ago by Viraj Sisodiya

Python Online Compiler

Write, Run & Share Python code online using OneCompiler's Python online compiler for free. It's one of the robust, feature-rich online compilers for python language, supporting both the versions which are Python 3 and Python 2.7. Getting started with the OneCompiler's Python editor is easy and fast. The editor shows sample boilerplate code when you choose language as Python or Python2 and start coding.

Taking inputs (stdin)

OneCompiler's python online editor supports stdin and users can give inputs to programs using the STDIN textbox under the I/O tab. Following is a sample python program which takes name as input and print your name with hello.

import sys
name = sys.stdin.readline()
print("Hello "+ name)

About Python

Python is a very popular general-purpose programming language which was created by Guido van Rossum, and released in 1991. It is very popular for web development and you can build almost anything like mobile apps, web apps, tools, data analytics, machine learning etc. It is designed to be simple and easy like english language. It's is highly productive and efficient making it a very popular language.

Tutorial & Syntax help

Loops

1. If-Else:

When ever you want to perform a set of operations based on a condition IF-ELSE is used.

if conditional-expression
    #code
elif conditional-expression
    #code
else:
    #code

Note:

Indentation is very important in Python, make sure the indentation is followed correctly

2. For:

For loop is used to iterate over arrays(list, tuple, set, dictionary) or strings.

Example:

mylist=("Iphone","Pixel","Samsung")
for i in mylist:
    print(i)

3. While:

While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.

while condition  
    #code

Collections

There are four types of collections in Python.

1. List:

List is a collection which is ordered and can be changed. Lists are specified in square brackets.

Example:

mylist=["iPhone","Pixel","Samsung"]
print(mylist)

2. Tuple:

Tuple is a collection which is ordered and can not be changed. Tuples are specified in round brackets.

Example:

myTuple=("iPhone","Pixel","Samsung")
print(myTuple)

Below throws an error if you assign another value to tuple again.

myTuple=("iPhone","Pixel","Samsung")
print(myTuple)
myTuple[1]="onePlus"
print(myTuple)

3. Set:

Set is a collection which is unordered and unindexed. Sets are specified in curly brackets.

Example:

myset = {"iPhone","Pixel","Samsung"}
print(myset)

4. Dictionary:

Dictionary is a collection of key value pairs which is unordered, can be changed, and indexed. They are written in curly brackets with key - value pairs.

Example:

mydict = {
    "brand" :"iPhone",
    "model": "iPhone 11"
}
print(mydict)

Supported Libraries

Following are the libraries supported by OneCompiler's Python compiler

Name	Description
NumPy	NumPy python library helps users to work on arrays with ease
SciPy	SciPy is a scientific computation library which depends on NumPy for convenient and fast N-dimensional array manipulation
SKLearn/Scikit-learn	Scikit-learn or Scikit-learn is the most useful library for machine learning in Python
Pandas	Pandas is the most efficient Python library for data manipulation and analysis
DOcplex	DOcplex is IBM Decision Optimization CPLEX Modeling for Python, is a library composed of Mathematical Programming Modeling and Constraint Programming Modeling