feat:new examples

.claude/skills/code-pr/SKILL.md

@@ -0,0 +1,19 @@
+---
+
+name : code-pr
+description: write a pr description when new pr is created or someone asks to review a pr or writing a pr
+
+---
+
+when writing a pr description 
+
+1. Run 'git diff main...HEAD" to see all the changes on this branch 
+2. write a description following this format 
+
+## what
+
+one sentence explaining what this pr is 
+
+## why 
+
+brief why it is neede 

Day-02/examples/03-regex-findall.py

@@ -1,10 +1,148 @@
 import re
 
-text = "The quick brown fox"
-pattern = r"brown"
-
-search = re.search(pattern, text)
-if search:
-    print("Pattern found:", search.group())
-else:
-    print("Pattern not found")
+# UNDERSTANDING RAW STRINGS (r"")
+print("=== WHAT DOES 'r' MEAN BEFORE STRINGS? ===\n")
+
+# The 'r' creates a RAW STRING - it treats backslashes literally
+# This is very important for regex patterns!
+
+# Example: Regular string vs Raw string
+print("Regular string:")
+regular_string = "Hello\nWorld"  # \n is interpreted as newline
+print(f"'{regular_string}'")
+print()
+
+print("Raw string:")
+raw_string = r"Hello\nWorld"  # \n is treated as literal characters
+print(f"'{raw_string}'")
+print()
+
+# Why is this important for regex?
+print("=== WHY RAW STRINGS ARE IMPORTANT FOR REGEX ===\n")
+
+# Example 1: Finding backslashes in text
+text_with_backslash = "File path: C:\\Users\\John\\Documents"
+print(f"Text: {text_with_backslash}")
+
+# Without raw string - CONFUSING!
+pattern_normal = "\\\\Users"  # Need 4 backslashes to match 2!
+matches_normal = re.findall(pattern_normal, text_with_backslash)
+print(f"Normal string pattern: '{pattern_normal}'")
+print(f"Matches: {matches_normal}")
+
+# With raw string - CLEAR!
+pattern_raw = r"\\Users"  # Only need 2 backslashes
+matches_raw = re.findall(pattern_raw, text_with_backslash)
+print(f"Raw string pattern: '{pattern_raw}'")
+print(f"Matches: {matches_raw}")
+print()
+
+# Example 2: Digit patterns
+print("=== DIGIT PATTERNS EXAMPLE ===")
+text_digits = "I have 25 apples and 100 oranges"
+print(f"Text: {text_digits}")
+
+# Both work the same for simple patterns like \d
+pattern_normal_digit = "\\d+"  # Need to escape the backslash
+pattern_raw_digit = r"\d+"     # Raw string - cleaner and more readable
+
+matches_normal_digit = re.findall(pattern_normal_digit, text_digits)
+matches_raw_digit = re.findall(pattern_raw_digit, text_digits)
+
+print(f"Normal string: '{pattern_normal_digit}' -> {matches_normal_digit}")
+print(f"Raw string: '{pattern_raw_digit}' -> {matches_raw_digit}")
+print()
+
+print("=== KEY POINTS ABOUT RAW STRINGS ===")
+print("1. Raw strings treat backslashes (\\) as literal characters")
+print("2. Regular strings interpret backslashes as escape characters")
+print("3. Raw strings make regex patterns much more readable")
+print("4. Always use raw strings for regex patterns: r'pattern'")
+print("5. Examples of escape characters in regular strings:")
+print("   \\n = newline")
+print("   \\t = tab")
+print("   \\' = single quote")
+print("   \\\\ = literal backslash")
+print()
+
+# BEGINNER REGEX EXAMPLES - Step by Step Learning
+
+print("=== BASIC REGEX PATTERNS ===\n")
+
+# Example 1: Finding simple words
+text1 = "I love Python programming and Python is easy"
+pattern1 = r"Python"  # Just finds the exact word "Python"
+matches1 = re.findall(pattern1, text1)
+print(f"Text: {text1}")
+print(f"Pattern: {pattern1}")
+print(f"Matches: {matches1}")
+print()
+
+# Example 2: Finding digits
+text2 = "I have 5 apples and 10 oranges"
+pattern2 = r"\d"  # \d means any digit (0-9)
+matches2 = re.findall(pattern2, text2)
+print(f"Text: {text2}")
+print(f"Pattern: {pattern2} (\\d means any digit)")
+print(f"Matches: {matches2}")
+print()
+
+# Example 3: Finding multiple digits together
+text3 = "I have 25 apples and 100 oranges"
+pattern3 = r"\d+"  # \d+ means one or more digits together
+matches3 = re.findall(pattern3, text3)
+print(f"Text: {text3}")
+print(f"Pattern: {pattern3} (\\d+ means one or more digits)")
+print(f"Matches: {matches3}")
+print()
+
+# Example 4: Finding words (letters only)
+text4 = "Hello123 World456 Python"
+pattern4 = r"[a-zA-Z]+"  # [a-zA-Z]+ means one or more letters
+matches4 = re.findall(pattern4, text4)
+print(f"Text: {text4}")
+print(f"Pattern: {pattern4} (letters only)")
+print(f"Matches: {matches4}")
+print()
+
+# Example 5: Finding words that start with capital letter
+text5 = "Python is Great for Data Science"
+pattern5 = r"[A-Z][a-z]+"  # [A-Z] = capital letter, [a-z]+ = lowercase letters
+matches5 = re.findall(pattern5, text5)
+print(f"Text: {text5}")
+print(f"Pattern: {pattern5} (capital letter + lowercase letters)")
+print(f"Matches: {matches5}")
+print()
+
+# Example 6: Finding email pattern (simplified)
+text6 = "Contact me at john@gmail.com or mary@yahoo.com"
+pattern6 = r"\w+@\w+\.\w+"  # \w+ = word characters, @ = literal @, \. = literal dot
+matches6 = re.findall(pattern6, text6)
+print(f"Text: {text6}")
+print(f"Pattern: {pattern6} (word@word.word)")
+print(f"Matches: {matches6}")
+print()
+
+# Example 7: Finding phone numbers (simple pattern)
+text7 = "Call me at 123-456-7890 or 555-123-4567"
+pattern7 = r"\d{3}-\d{3}-\d{4}"  # \d{3} = exactly 3 digits
+matches7 = re.findall(pattern7, text7)
+print(f"Text: {text7}")
+print(f"Pattern: {pattern7} (3digits-3digits-4digits)")
+print(f"Matches: {matches7}")
+print()
+
+print("=== REGEX CHEAT SHEET ===")
+print("\\d    = any digit (0-9)")
+print("\\w    = any word character (letters, digits, underscore)")
+print("\\s    = any whitespace (space, tab, newline)")
+print("+     = one or more of the previous character")
+print("*     = zero or more of the previous character")
+print("?     = zero or one of the previous character")
+print("{3}   = exactly 3 of the previous character")
+print("[a-z] = any lowercase letter")
+print("[A-Z] = any uppercase letter")
+print("[0-9] = any digit (same as \\d)")
+print(".     = any character except newline")
+print("^     = start of string")
+print("$     = end of string")

Day-02/examples/03-regex-match.py

@@ -1,10 +1,116 @@
 import re
 
-text = "The quick brown fox"
-pattern = r"quick"
+# REGEX MATCH EXAMPLES - Beginner Friendly
 
-match = re.match(pattern, text)
-if match:
-    print("Match found:", match.group())
+print("=== UNDERSTANDING re.match() ===")
+print("re.match() only matches at the BEGINNING of the string\n")
+
+# Example 1: Basic match - Success case
+text1 = "Python is awesome"
+pattern1 = r"Python"
+match1 = re.match(pattern1, text1)
+print(f"Text: '{text1}'")
+print(f"Pattern: '{pattern1}'")
+if match1:
+    print(f"Match found: '{match1.group()}'")
+    print(f"Match position: {match1.start()}-{match1.end()}")
+else:
+    print("No match")
+print()
+
+# Example 2: Basic match - Failure case
+text2 = "I love Python programming"
+pattern2 = r"Python"
+match2 = re.match(pattern2, text2)
+print(f"Text: '{text2}'")
+print(f"Pattern: '{pattern2}'")
+if match2:
+    print(f"Match found: '{match2.group()}'")
+else:
+    print("No match (Python is not at the beginning)")
+print()
+
+# Example 3: Matching numbers at the start
+text3 = "123 Main Street"
+pattern3 = r"\d+"  # \d+ means one or more digits
+match3 = re.match(pattern3, text3)
+print(f"Text: '{text3}'")
+print(f"Pattern: '{pattern3}' (one or more digits)")
+if match3:
+    print(f"Match found: '{match3.group()}'")
+else:
+    print("No match")
+print()
+
+# Example 4: Matching email format from start
+text4 = "john@example.com sent you a message"
+pattern4 = r"\w+@\w+\.\w+"  # simple email pattern
+match4 = re.match(pattern4, text4)
+print(f"Text: '{text4}'")
+print(f"Pattern: '{pattern4}' (email format)")
+if match4:
+    print(f"Match found: '{match4.group()}'")
+else:
+    print("No match")
+print()
+
+# Example 5: Matching phone number at start
+text5 = "123-456-7890 is my phone number"
+pattern5 = r"\d{3}-\d{3}-\d{4}"  # phone number format
+match5 = re.match(pattern5, text5)
+print(f"Text: '{text5}'")
+print(f"Pattern: '{pattern5}' (phone format)")
+if match5:
+    print(f"Match found: '{match5.group()}'")
 else:
     print("No match")
+print()
+
+# Example 6: Case sensitivity
+text6 = "python is great"
+pattern6 = r"Python"  # Capital P
+match6 = re.match(pattern6, text6)
+print(f"Text: '{text6}'")
+print(f"Pattern: '{pattern6}' (case sensitive)")
+if match6:
+    print(f"Match found: '{match6.group()}'")
+else:
+    print("No match (case sensitive - 'python' != 'Python')")
+print()
+
+# Example 7: Case insensitive matching
+text7 = "python is great"
+pattern7 = r"Python"
+match7 = re.match(pattern7, text7, re.IGNORECASE)  # Case insensitive flag
+print(f"Text: '{text7}'")
+print(f"Pattern: '{pattern7}' (case insensitive)")
+if match7:
+    print(f"Match found: '{match7.group()}'")
+else:
+    print("No match")
+print()
+
+print("=== COMPARISON: match() vs search() vs findall() ===")
+test_text = "Hello Python world, Python is amazing"
+test_pattern = r"Python"
+
+print(f"Text: '{test_text}'")
+print(f"Pattern: '{test_pattern}'")
+
+# Using match()
+match_result = re.match(test_pattern, test_text)
+print(f"re.match(): {match_result.group() if match_result else 'No match'}")
+
+# Using search()
+search_result = re.search(test_pattern, test_text)
+print(f"re.search(): {search_result.group() if search_result else 'No match'}")
+
+# Using findall()
+findall_result = re.findall(test_pattern, test_text)
+print(f"re.findall(): {findall_result}")
+
+print("\n=== KEY POINTS ===")
+print("1. re.match() only matches at the START of the string")
+print("2. re.search() finds the FIRST occurrence anywhere in the string")
+print("3. re.findall() finds ALL occurrences in the string")
+print("4. Use re.IGNORECASE flag for case-insensitive matching")

Day-02/examples/test.py

@@ -0,0 +1,4 @@
+name="shivam"
+name1="tiwari"
+print(name+" "+name1)
+print(len(name+name1))

Day-08/02-Assigment/01-list-questions.md

@@ -4,11 +4,5 @@
 
 **Q2: How do you create a list in Python, and can you provide an example related to DevOps?**
 
-**Q3: What is the difference between a list and a tuple in Python, and when would you choose one over the other in a DevOps context?**
 
-**Q4: How can you access elements in a list, and provide a DevOps-related example?**
-
-**Q5: How do you add an element to the end of a list in Python? Provide a DevOps example.**
-
-**Q6: How can you remove an element from a list in Python, and can you provide a DevOps use case?**