Review of Week 1 Homework:

Write a program that prints "Hello World" (or some variant of it) and consider adding interaction.

Working:



In [7]:

    
print("Hello, world")









    



Hello, world

Not working:



In [2]:

    
# Python 2 version
print("Hello, world")









    



Hello, world

Troubleshooting:

Double quotes, especially if pasted in fromm Word or PowerPoint, can cause problems



In [3]:

    
print(“Hello world“)









    



  File "<ipython-input-3-8de83d741442>", line 1
    print(“Hello world“)
               ^
SyntaxError: invalid character in identifier



In [5]:

    
print("Hello world")









    



Hello world



In [8]:

    
import unicodedata



In [10]:

    
# Good double quote:
unicodedata.category('"')









    Out[10]:





'Po'



In [13]:

    
# Good single quote
unicodedata.category("'")









    Out[13]:





'Po'



In [9]:

    
# BAD...double quote
unicodedata.category('“')









    Out[9]:





'Pi'



In [14]:

    
# BAD...single quote
unicodedata.category("`")









    Out[14]:





'Sk'

SOLUTION: Paste code into a basic text editor first, then replace quotes if you suspect thay are causing a problem.



In [ ]:

    
name = input()
print("Hello" + name)



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