Python Tutorial for Beginners - 4. Dictionaries - Working with Key-Value Pairs

  1. Run Code 1 in Python
  2. Run Code 2 in Python
  3. Run Code 3 in Python
  4. Run Code 4 in Python
  5. Run Code 5 in Python
  6. Run Code 6 in Python
  7. Run Code 7 in Python
  8. Run Code 8 in Python
  9. Run Code 9 in Python

Run Code 1 in Python

# file: 'app1.py'
student = {'name': 'John', 'age': 25, 'courses': ['Math', 'CompSci']}

for key, value in student.items():
    print(key, value)

Run Code 2 in Python

# file: 'app2.py'
student = {'name': 'John', 'age': 25, 'courses': ['Math', 'CompSci']}

print(student)
print(student['courses'])

Run Code 3 in Python

# file: 'app3.py'
student = {'name': 'John', 'age': 25, 'courses': ['Math', 'CompSci']}

print(student['phone']) #KeyError: 'phone'

Run Code 4 in Python

# file: 'app4.py'
student = {'name': 'John', 'age': 25, 'courses': ['Math', 'CompSci']}

print(student.get('name'))
print(student.get('phone'))

print(student.get('phone', 'Not found'))

Run Code 5 in Python

# file: 'app5.py'
student = {'name': 'John', 'age': 25, 'courses': ['Math', 'CompSci']}

student['phone'] = '555-5555'
student['name'] = 'MT'

print(student)

Run Code 6 in Python

# file: 'app6.py'
student = {'name': 'John', 'age': 25, 'courses': ['Math', 'CompSci']}

student.update({'name': 'MT', 'age': 31, 'phone':'0401234567'})

print(student)

Run Code 7 in Python

# file: 'app7.py'
student = {'name': 'John', 'age': 25, 'courses': ['Math', 'CompSci']}

age = student.pop('age')

print(student)
print(age)

Run Code 8 in Python

# file: 'app8.py'
student = {'name': 'John', 'age': 25, 'courses': ['Math', 'CompSci']}


print(len(student))
print(student.values())
print(student.items())

Run Code 9 in Python

# file: 'app9.py'
student = {'name': 'John', 'age': 25, 'courses': ['Math', 'CompSci']}

for key, value in student.items():
    print(key, value)

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