Print Formatting

There are various ways to write print statements. In Python 3, to print to console you use print functions.

In the following lecture we will cover:

1. "%" notation for Strings, Floats, and Integers
2. Use the .format() method
3. Other Print function uses

Here is the basic way to print.



In [16]:

    
print("We are printing")









    



We are printing

Percent Notation with Strings, Floats, and Integers

You can format your printing using percent notation. Recall, we use the following notation for various types:

Strings: %s
Integers: %d
Float: %f



In [17]:

    
s = "this is a string"



In [18]:

    
print("Well, %s" % (s))









    



Well, this is a string

Below, we are demoing printing floats.



In [19]:

    
my_float = 13.9



In [20]:

    
print("I've got %.2f apples" % (my_float))









    



I've got 13.90 apples

We can add spaces to the output if we wanted to.



In [13]:

    
print("%10.2f <--- look at all of this space" % (my_float))









    



     13.90 <--- look at all of this space

You can format multiple types of objects with the percent notation. Let's try a string, float, and integer.



In [15]:

    
name = "Michael"
age = 19
schooling = 4
print("Name: %s Age: %d Schooling Years: %0.1f" % (name, age, schooling))









    



Name: Michael Age: 19 Schooling Years: 4.0

Formatting with the format() Method

Traditionally, string formatting has included using the percent notation with %s, %f, and %d. We've seen the syntax before in the String iPython notebook. Here we can see it again.

my_str.format(var1, var2)



In [2]:

    
my_str = "No one said becoming a {x} entrepreneur was as easy as {y} ({z})".format(x="tech", y=3.14, z="pie")



In [3]:

    
print(my_str)









    



No one said becoming a tech entrepreneur was as easy as 3.14 (pie)

Print Function Revamped

The Python 3 print function is notated in the documentation as the following:

print(*objects, sep=' ', end='\n', file=sys.stdout, flush=False)

Let's see what "sep" means.



In [4]:

    
# Normal print
print("hello")









    



hello



In [6]:

    
# Utilizing the "sep" parameter by simply adding multiple object arguments
print("hello", "there")









    



hello there

As you can see, the "sep" parameter adds a space of seperation between object arguments.