Q71. How is memory managed in Python?
Memory management in Python involves a private heap containing all Python objects and data structures. Interpreter takes care of Python heap and the programmer has no acc...
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Q72. What is __init__.py?
The **`__init__.py`** file indicates that the directory containing it should be treated as a regular **Python package namespace**. ### Key Functions of `__init__.py`: 1. ...
Q73. Print contents of a file ensuring proper error handling?
try: withopen('filename','r')asf: printf.read() exceptIOError: print"Nosuchfileexists" 75 How do we share global variables across modules in Python? We can create a confi...
Q74. Does Python support Multithreading?
Yes, Python supports multithreading via the standard library `threading` module. However, due to CPython's **Global Interpreter Lock (GIL)**, only one native thread execu...
Q75. How do I get a list of all files (and directories) in a given directory in Python?
Following is one possible solution there can be other similar ones: ```python import os ``` for dirname,dirnames,filenames in os.walk('.'): #printpathtoallsubdirectories...
Q76. How to append to a string in Python?
Because Python strings are **immutable**, you cannot directly append characters to an existing string in memory. Each append creates a new string object: ### 1. The `+=` ...
Q77. How to convert a string to lowercase in Python?
Use the `.lower()` or `.casefold()` string method in Python: ```python s = 'MYSTRING' print(s.lower()) # Output: 'mystring' ``` *Tip:* `.casefold()` is recommended for ca...
Q78. How to check if string A is substring of string B?
The most readable, pythonic, and performant way to check if substring A exists inside string B is using the **`in` operator**: ```python str_b = "HireXTech Interview Prep...
Q79. Find all occurrences of a substring in Python?
There is no simple builtin string function that does what you're looking for, but you could use the more powerful regular expressions: >>>[m.start()forminre.finditer('te...
Q80. What is GIL? What does it do?Talk to me about the GIL. How does it impact concurrency in Python? What kinds of applications does it impact more than others?
Python's GIL is intended to serialize access to interpreter internals from different threads. On multicore systems, it means that multiple threads can't effectively make...