Explain how file handling works in Python for text files. Mention different file modes, and a short description of read(), readline() and write().
In Python, file handling allows programs to create, read, update, and delete files. To work with a text file, the `open()` function is used, which returns a file object. The basic syntax is `file = open(filename, mode)`, where `filename` is the name of the file, and `mode` specifies the ____ ____ __________ __________ ____ ______ __________ _____.
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Describe any two Python libraries used for data visualization.
Write a Python program to accept a list of tuples (product_name, price) for 5 items from the user, then sort the list by price in descending order using a function.
Describe the key features of Spyder.
Write a Python program using NumPy to
(i) Create following two matrices P and Q with following elements.$
(ii) Compute the (a) Addition, (b) Multiplication, (c) Determinant and (d) Inverse of these matrices.
(iii) Combine the given matrices row-wise and determine the transpose of the combined matrix.
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Would you like me to write the actual Python code to solve these problems for you?
Find and correct the error in the following code.
import numpy as np
arr = np.array[4, 5, 6]
print(arr)
Write a Python program using NumPy to
(i) Create following two matrices P and Q with following elements.$
(ii) Compute the (a) Addition, (b) Multiplication, (c) Determinant and (d) Inverse of these matrices.
(iii) Combine the given matrices row-wise and determine the transpose of the combined matrix.
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Write the output of the following Python code.
nums = [10, 20, 30, 40, 50]
print(nums[-2])