Deepak Prasad

Learn tree data structure in Python with simple examples. Understand nodes, root, children, binary trees, binary search trees, DFS, BFS, inorder, preorder, and postorder traversal.

Learn how to sort a dictionary by value in Python using sorted(), lambda, itemgetter(), reverse=True, and custom sorting. See examples for ascending order, descending order, duplicate values, and nested dictionaries.

Learn how to split a string in Python using str.split(). See examples for splitting by whitespace, comma, newline, multiple spaces, maxsplit, rsplit(), splitlines(), and regex delimiters.

Learn Python sets with simple examples. See how to create a set, add and remove items, check membership, remove duplicates, and use union, intersection, difference, symmetric difference, issubset, issuperset, and …

Learn how to append to a string in Python using +, +=, f-strings, format(), and join(). Understand why Python strings have no append() method and when to use each approach.

Learn how to check if a string contains a substring in Python using the in operator, find(), index(), count(), and regex. See case-sensitive, case-insensitive, multiple substring, whole-word, and pattern matching …

Learn Python string formatting using f-strings, str.format(), and percent formatting. See examples for variables, numbers, decimal precision, padding, alignment, percentages, dates, and %d meaning in Python.

Learn how to replace text in a file using Python. See examples for replacing a string in the same file, writing to a new file, handling large files, using fileinput with backup, and regex replacement with re.sub().

Learn what a tuple is in Python with simple examples. See how to create tuples, access items, use indexing and slicing, unpack tuples, compare tuples with lists, and use tuple methods.

Learn how to check the type of a variable in Python using type() and isinstance(). See when to use each method, how to check multiple types, and how type hints differ from runtime type checking.

Learn what yield means in Python and how it creates generator functions. Understand yield vs return, next(), for loops, generator expressions, yield from, and common mistakes with simple examples.

Learn how to build an RPM package in Linux using rpmbuild. Create the rpmbuild directory structure, write a SPEC file, build RPM from source, create RPM from scratch, and verify the package.

Learn how to write to a file in Python using with open(). Create a new file, overwrite an existing file, append data, write multiple lines, and avoid common file mode mistakes.

Learn how to use multiple conditions in a Python while loop using and, or, not, parentheses, and two-condition examples. Understand when the loop stops and how to avoid infinite loops.

Understand various terminologies with linux memory management, dirty page, swapping, inactive, active memory, Translation Lookaside Buffers (TLB), page cache

Step-by-Step Tutorial to configure hugepages in red hat and centos 7/8 linux using vm nr_hugepages in /etc/sysctl.conf. Also configure hugepages pool using hugeadm

Learn how to check Transparent HugePages in Linux, verify if THP is enabled or disabled, understand AnonHugePages vs static hugepages, and find per-process THP usage.

Compare HugePages (static HugeTLB) and Transparent HugePages in Linux: what each is, when to use or disable them, how to check and configure them, how Kubernetes exposes hugepages-2Mi and hugepages-1Gi, and how to …

Learn how the Python continue statement works in for loops, while loops, if conditions, and nested loops, with examples, flowchart, break vs continue, and common mistakes.

Learn what the pass statement does in Python, when to use it in functions, classes, if blocks, loops, and exception handling, and how pass differs from continue, break, and return.

Learn Python numeric types including integers, floating-point numbers, and complex numbers. Understand int vs float, type conversion, numeric literals, precision, and when to use each number type.

Learn how Python next() works with iterators, default values, StopIteration, generators, first-item lookup, and first matching item patterns.

Learn how to create directories recursively in Python using pathlib Path.mkdir(parents=True, exist_ok=True) and os.makedirs(), including create-if-not-exists examples and common errors.

Learn Python Matplotlib pyplot with simple plot examples. Create line plots, scatter plots, bar charts, and make beautiful plots using labels, colors, markers, legends, grids, styles, and savefig().

Learn how to create custom exceptions in Python by subclassing Exception, raise custom exceptions with messages, catch them, add attributes, chain exceptions, and follow best practices.

Compare Python list, tuple, set, and dictionary with examples. Learn the differences in order, mutability, duplicates, indexing, syntax, use cases, and when to use each data type.

Learn Python list extend() method with examples. Add items from another list, tuple, set, string, or dictionary, and understand extend() vs append(), +, and +=.

Learn Python while loop with simple examples, including syntax, counter loops, user input, break, continue, while else, nested while loops, and multiple conditions.

Learn Python len() function with simple examples. Get the length of strings, lists, tuples, dictionaries, sets, ranges, and custom objects, and fix common TypeError mistakes.

Learn how to write Python if else in one line using the conditional expression syntax. Includes one-line if, if else, if elif else, nested conditions, and common mistakes.