Python: Check if a given element occurs at least n times in a list
Python List: Exercise - 153 with Solution
Write a Python program to check if a given element occurs at least n times in a list.
Sample Solution:
Python Code:
def check_element_in_list(lst, x, n):
t = 0
try:
for _ in range(n):
t = lst.index(x, t) + 1
return True
except ValueError:
return False
nums = [0,1,3,5,0,3,4,5,0,8,0,3,6,0,3,1,1,0]
print("Original list:")
print(nums)
x = 3
n = 4
print("\nCheck if",x,"occurs at least",n,"times in a list:")
print(check_element_in_list(nums,x,n))
x = 0
n = 5
print("\nCheck if",x,"occurs at least",n,"times in a list:")
print(check_element_in_list(nums,x,n))
x = 8
n = 3
print("\nCheck if",x,"occurs at least",n,"times in a list:")
print(check_element_in_list(nums,x,n))
Sample Output:
Original list: [0, 1, 3, 5, 0, 3, 4, 5, 0, 8, 0, 3, 6, 0, 3, 1, 1, 0] Check if 3 occurs at least 4 times in a list: True Check if 0 occurs at least 5 times in a list: True Check if 8 occurs at least 3 times in a list: False
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Python: Tips of the Day
Find current directory and file's directory:
To get the full path to the directory a Python file is contained in, write this in that file:
import os dir_path = os.path.dirname(os.path.realpath(__file__))
(Note that the incantation above won't work if you've already used os.chdir() to change your current working directory, since the value of the __file__ constant is relative to the current working directory and is not changed by an os.chdir() call.)
To get the current working directory use
import os cwd = os.getcwd()
Documentation references for the modules, constants and functions used above:
- The os and os.path modules.
- The __file__ constant
- os.path.realpath(path) (returns "the canonical path of the specified filename, eliminating any symbolic links encountered in the path")
- os.path.dirname(path) (returns "the directory name of pathname path")
- os.getcwd() (returns "a string representing the current working directory")
- os.chdir(path) ("change the current working directory to path")
Ref: https://bit.ly/3fy0R6m
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