In [1]:

    

# print('hello'

# SyntaxError: unexpected EOF while parsing


    

In [2]:

    

print('hello')


    

    




hello

In [3]:

    

# for i in range(3)
#     print(i)

# SyntaxError: invalid syntax


    

In [4]:

    

for i in range(3):
    print(i)


    

    




0
1
2

In [5]:

    

n = 100

# if n == 100:
#     print('n is 100')
#   else:
#     print('n is not 100')

# IndentationError: unindent does not match any outer indentation level


    

In [6]:

    

n = 100

if n == 100:
    print('n is 100')
else:
    print('n is not 100')


    

    




n is 100

In [7]:

    

# import mathematics

# ModuleNotFoundError: No module named 'mathematics'


    

In [8]:

    

import math

print(math.pi)


    

    




3.141592653589793

In [9]:

    

# import math.pi

# ModuleNotFoundError: No module named 'math.pi'; 'math' is not a package


    

In [10]:

    

from math import pi

print(pi)


    

    




3.141592653589793

In [11]:

    

# from math import COS

# ImportError: cannot import name 'COS' from 'math' (/usr/local/Cellar/python/3.7.0/Frameworks/Python.framework/Versions/3.7/lib/python3.7/lib-dynload/math.cpython-37m-darwin.so)


    

In [12]:

    

from math import cos

print(cos(0))


    

    




1.0

In [13]:

    

import math

# print(math.PI)

# AttributeError: module 'math' has no attribute 'PI'


    

In [14]:

    

print(math.pi)


    

    




3.141592653589793

In [15]:

    

l = 100

# l.append(200)

# AttributeError: 'int' object has no attribute 'append'


    

In [16]:

    

l = [100]

l.append(200)
print(l)


    

    




[100, 200]

In [17]:

    

n = '100'

# print(n + 200)

# TypeError: can only concatenate str (not "int") to str


    

In [18]:

    

n = 100

print(100 + 200)


    

    




300

In [19]:

    

# print(float(['1.23E-3']))

# TypeError: float() argument must be a string or a number, not 'list'


    

In [20]:

    

print(float('1.23E-3'))


    

    




0.00123

In [21]:

    

# print(float('float number'))

# ValueError: could not convert string to float: 'float number'


    

In [22]:

    

print(float('1.23E-3'))


    

    




0.00123

In [23]:

    

n = 100
zero = 0

# print(n / zero)

# ZeroDivisionError: division by zero

# print(n // zero)

# ZeroDivisionError: integer division or modulo by zero

# print(n % zero)

# ZeroDivisionError: integer division or modulo by zero


    

In [24]:

    

my_number = 100


    

In [25]:

    

# print(myNumber)

# NameError: name 'myNumber' is not defined


    

In [26]:

    

print(my_number)


    

    




100

In [27]:

    

l = [0, 1, 2]

# print(l[100])

# IndexError: list index out of range


    

In [28]:

    

print(len(l))


    

    




3

In [29]:

    

print(l[1])


    

    




1

In [30]:

    

d = {'a': 1, 'b': 2, 'c': 3}


    

In [31]:

    

# print(d['x'])

# KeyError: 'x'


    

In [32]:

    

print(d['a'])


    

    




1

In [33]:

    

print(d)


    

    




{'a': 1, 'b': 2, 'c': 3}

In [34]:

    

print(list(d.keys()))


    

    




['a', 'b', 'c']

In [35]:

    

print(d.get('x'))


    

    




None

In [36]:

    

# with open('not_exist_file.txt') as f:
#     print(f.read())

# FileNotFoundError: [Errno 2] No such file or directory: 'not_exist_file.txt'


    

In [37]:

    

import os

# os.mkdir('data')

# FileExistsError: [Errno 17] File exists: 'data'