#37. .startswith()
Returns True if the string starts with the specified value.

filename = "document.pdf"
print(filename.startswith("doc"))

True

#38. .endswith()
Returns True if the string ends with the specified value.

filename = "image.jpg"
print(filename.endswith(".jpg"))

True

#39. .find()
Searches the string for a specified value and returns the position of where it was found. Returns -1 if not found.

text = "hello world"
print(text.find("world"))

6

#40. f-string (Formatted String Literal)
A way to embed expressions inside string literals.

name = "Alice"
age = 30
print(f"{name} is {age} years old.")

Alice is 30 years old.

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#Python #ListMethods #DataStructures

#41. .append()
Adds an element at the end of the list.

fruits = ['apple', 'banana']
fruits.append('cherry')
print(fruits)

['apple', 'banana', 'cherry']

#42. .pop()
Removes the element at the specified position.

fruits = ['apple', 'banana', 'cherry']
fruits.pop(1) # Removes 'banana'
print(fruits)

['apple', 'cherry']

#43. .remove()
Removes the first item with the specified value.

fruits = ['apple', 'banana', 'cherry', 'banana']
fruits.remove('banana')
print(fruits)

['apple', 'cherry', 'banana']

#44. .insert()
Adds an element at the specified position.

fruits = ['apple', 'cherry']
fruits.insert(1, 'banana')
print(fruits)

['apple', 'banana', 'cherry']

#45. .sort()
Sorts the list in place.

numbers = [3, 1, 5, 2]
numbers.sort()
print(numbers)

[1, 2, 3, 5]

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#Python #DictionaryMethods #DataStructures

#46. dict()
Creates a dictionary.

my_dict = dict(name="John", age=36)
print(my_dict)

{'name': 'John', 'age': 36}

#47. .keys()
Returns a view object displaying a list of all the keys in the dictionary.

person = {'name': 'Alice', 'age': 25}
print(person.keys())

dict_keys(['name', 'age'])

#48. .values()
Returns a view object displaying a list of all the values in the dictionary.

person = {'name': 'Alice', 'age': 25}
print(person.values())

dict_values(['Alice', 25])

#49. .items()
Returns a view object displaying a list of a given dictionary's key-value tuple pairs.

person = {'name': 'Alice', 'age': 25}
print(person.items())

dict_items([('name', 'Alice'), ('age', 25)])

#50. .get()
Returns the value of the specified key. Provides a default value if the key does not exist.

person = {'name': 'Alice', 'age': 25}
print(person.get('city', 'Unknown'))

Unknown

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#Python #ErrorHandling #FileIO

#51. try, except
Used to handle errors and exceptions.