Ecosyste.ms: Awesome
An open API service indexing awesome lists of open source software.
https://github.com/yuvrajchandra/hackerrank-python
This repository contains solutions of Python problems from HackerRank and some tips & tricks to solve python programs.
https://github.com/yuvrajchandra/hackerrank-python
Last synced: 2 days ago
JSON representation
This repository contains solutions of Python problems from HackerRank and some tips & tricks to solve python programs.
- Host: GitHub
- URL: https://github.com/yuvrajchandra/hackerrank-python
- Owner: Yuvrajchandra
- License: mit
- Created: 2020-11-15T10:51:09.000Z (about 4 years ago)
- Default Branch: main
- Last Pushed: 2020-11-16T06:08:35.000Z (almost 4 years ago)
- Last Synced: 2023-10-19T23:59:36.336Z (about 1 year ago)
- Size: 30.3 KB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
# HackerRank-Python
This repository contains solutions of Python problems from HackerRank and some tips & tricks to solve python programs.
---
+ **strip()**
The strip() method removes characters from both left and right based on the argument (a string specifying the set of characters to be removed).
---
+ **Python Division**
/ : It is used for integer division
// : It is used for float division
For eg-
4 / 3 = 1
4 // 3 = 1.33333333333
---
+ **To convert a space separated input into list**
arr = list(map(int, input().split()))
---
+ **To iterate key, values of dictionary**
dict_obj = {}
for key,values in dict_obj.items():
---
+ **To get dictionary keys as list**
key_list = dict_obj.keys()
---
+ **To get dictionary values as list**
values_list = dict_obj.values()
---
+ **To print float numbers upto specified decimal places**
print("{:.4f}".format(22/7))
**->** 3.1429
---
+ **Some common operations of List in Python**
1.) append(x) - Adds a single element x to the end of a list.
2.) extend(L) - Merges another list L to the end.
3.) insert(i,x) - Inserts element x at position i.
4.) remove(x) - Removes the first occurrence of element x.
5.) pop() - Removes the last element of a list. If an argument is passed, that index item is popped out.
6.) index(x) - Returns the first index of a value in the list. Throws an error if it's not found.
7.) count(x) - Counts the number of occurrences of an element x.
8.) sort() - Sorts the list.
9.) reverse() - Reverses the list.
---
+ **Python hash()**
The hash() method returns the hash value of an object if it has one.
---
+ **To input a complex number**
complex_num = complex(input())
---
+ **To get ASCII Code from a character**
ord() is used
---
+ **To get character from ASCII Code**
chr() is used
[Complete mapping of ASCII Table](https://www.rapidtables.com/code/text/ascii-table.html)
---
+ **Python Strings**
1. swapcase() - The string swapcase() method converts all uppercase characters to lowercase and vice versa of the given string, and returns it.
```
string = "gEEksFORgeeks"
print(string.swapcase())
GeeKSforGEEKS
```
2. isupper() - The isupper() methods returns “True” if all characters in the string are uppercase, Otherwise, It returns “False”.
3. islower() - The islower() methods returns “True” if all characters in the string are lowercase, Otherwise, It returns “False”.
4. lower() - The lower() methods returns the lowercased string from the given string.
5. upper() - The upper() methods returns the uppercased string from the given string.
---
+ **Python String join()**
The join() method takes all items in an iterable and joins them into one string.
A string must be specified as the separator.
```
string.join(iterable)
```
```
myTuple = ("John", "Peter", "Vicky")
x = "#".join(myTuple)
print(x)
John#Peter#Vicky
```
---
+ **startswith()**
The startswith() method returns True if the string starts with the specified value, otherwise False.
```
string.startswith(value, start, end)
```
---
+ **Python String Validators**
1. str.isalnum() - This method checks if all the characters of a string are alphanumeric (a-z, A-Z and 0-9).
2. str.isalpha() - This method checks if all the characters of a string are alphabetical (a-z and A-Z).
3. str.isdigit() - This method checks if all the characters of a string are digits (0-9).
4. str.islower() - This method checks if all the characters of a string are lowercase characters (a-z).
5. str.isupper() - This method checks if all the characters of a string are uppercase characters (A-Z).
---
+ **any() function**
The any() function returns True if any item in an iterable are true, otherwise it returns False.
```
myset = {0, 1, 0}
x = any(myset)
>>> True
```
```
print any(c.isalnum() for c in str)
print any(c.isalpha() for c in str)
print any(c.isdigit() for c in str)
print any(c.islower() for c in str)
print any(c.isupper() for c in str)
```
---