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Python practice problems help beginners to become experts in a python programming language with a small amount of practice effort.
In this python numpy program, we will test whether a number is scalar or not using NumPy.
import numpy as np
x = 8.9
print(np.isscalar(x))
y = [8.9]
print(np.isscalar(y))
Output:
True
False
In this python numpy program, we will test element-wise for real numbers of a given array using NumPy.
import numpy as np
x = np.array([2,4,6+9j,7])
print(np.isreal(x))
Output :
[ True True False True]
In this python numpy program, we will test element-wise for complex numbers of a given array using NumPy.
import numpy as np
x = np.array([2,4,6+9j,7])
print(np.iscomplex(x))
Output :
[False False True False]
In this python numpy program, we will test element-wise for NaN of a given array using NumPy.
import numpy as np
x = np.array([2,4,np.nan,7])
print(np.isnan(x))
Output :
[False False True False]
In this python numpy program, we will test a given array element-wise is finite or not using NumPy.
import numpy as np
x = np.array([6,8,3,np.inf])
print(np.isfinite(x))
Output :
[ True True True False]
In this python numpy program, we will test whether none of the elements of a given array is zero using Numpy.
import numpy as np
x = np.array([6,0,1,0])
print(np.all(x))
Output :
False
In this python numpy program, we will test whether none of the elements of a given array is zero using Numpy.
import numpy as np
x = np.array([6,8,3,5])
print(np.all(x))
Output :
True
In this python numpy program, we will get the NumPy version installed in your IDE.
import numpy as np
print(np.__version__)
Output :
1.20.1
test whether none of the elements of a given array is zero.
Python program to convert a dictionary into n sized dictionary, In this dictionary program, will break the dictionary into a specified size and store it in a list.
1. Initiate three variables
N = 3 (size of the dictionary)
temp = {} (empty dictionary)
count = 1 (initiate counter)
output = [] (empty list to store output)2. Iterate through the dictionary data using the loop.
for val in Input_values3. Store key value in temp dictionary its size is equal to N, and
add temp to the output list, re-initiate after that count=1 . and temp={}
4. Print output.
input_dict = { 'a':1, 'b':2, 'c':3, 'd':4, 'e':5, 'f':6 }
N = 3
temp = {}
count = 1
output = []
for val in input_dict:
if count == N:
output.append(temp)
count = 1
temp = {}
else:
temp[val] = input_dict[val]
count+= 1
print("Output : ", output)
Output :
Output : [{'a': 1, 'b': 2}, {'d': 4, 'e': 5}]
Sort Dictionary by values summation
Python program to sort dictionary by value summation, In this dictionary program will sort the dictionary data as per the sum of list data in ascending order.
1. Create an empty dictionary temp, temp = {}
2. Iterate over the dictionary key and value with for loop.
for key, value in input_dict.items()
3. Add the key and sum of values in the temp dictionary.
temp[key] = sum(value)4. Sort all the elements of the dictionary using the sorted method.
which will return the list tuple of key and value pairs.
sorted(temp.items(), key=lambda x:x[1])
5. Convert a list of data into a dictionary.
output = dict(sorted_values)
6. print the output.
input_dict = { "x":[1,5,6], "y":[4,8,2], "c":[3,9] }
temp = {}
for key, value in input_dict.items():
temp[key] = sum(value)
sorted_values = sorted(temp.items(), key=lambda x:x[1])
output = dict(sorted_values)
print(output)
Output :
{ x:12, c:12, y:14}