Python - Tricks - Part-1

1. Printing Horizontally 

Default it will print one after another

list1 = [1, 3, 6, 7]

for number in list1:

print(number,end=" ")

2. Print using separator

print(1,2,3,4, sep="|") 

3. Merging Dictionaries using pipe |

agegen1 = { "prasad":38, "dilip" : 33}

agegen2 = { "karthik":12, "Maanas" : 6}

agegen = agegen1 | agegen2

print(agegen) 

4. Merging Dictionaries using pipe **

agegen1 = { "prasad":38, "dilip" : 33}

agegen2 = { "karthik":12, "Maanas" : 6}

agegen = {**agegen1 , **agegen2}

print(agegen) 

5. Calendar with Python

import calendar

year_2024_isleap_year = calendar.isleap(2024)

year_2023_isleap_year = calendar.isleap(2023)

if year_2024_isleap_year == True:

print("Year 2024 is leap Year")

else:

print("Year 2024 is not a leap Year")

if year_2023_isleap_year == True:

print("Year 2023 is leap Year")

else:

print("Year 2023 is not leap Year") 

 

6. Get current time and Date

from datetime import datetime

time_now = datetime.now()

print("Timestamp Now: ",time_now)

time_now = datetime.now().strftime('%H:%M:%S')

print("Time Now: ",time_now)

from datetime import date

date_now = date.today()

print("Today's Date: ",date_now) 

 

 7. Sort a List in descending order

list1 = [11,1,3,5,8,4,2]

list1.sort(reverse = True)

print(list1) 

8. Swapping Variables

x, y = 10, 40

print("x is ", x)

print("y is ", y)

x, y = y, x

print("x is ", x)

print("y is ", y) 

9. Counting Item Occurrences

from collections import Counter
list1 = ['Karthik','Maanas','Karthik','Prasad','Dilip']
count_karthik = Counter(list1).get('Karthik')

print(f'Karthik Appears {count_karthik} times') 

 

 10. Flatten the list

#method 1

list1 = [[1,2,3],[3,5,6]]

newlist = []

for list2 in list1:

for i in list2:

newlist.append(i)

print('method 1', newlist)

#method 2

import itertools

newlist1 = list(itertools.chain.from_iterable(list1))

print('method 2', newlist1)

#method 3

newlist2 = [i for j in list1 for i in j]

print('method 3', newlist2)