Don't understand why print(char + int) causes an error

Question

fname3 = input("Enter the Blue print name: ")
import re
with open (fname3) as file:
    fileText=file.read()
q1,q2,q3 = [ int(n) for n in re.findall(": (\d+)",fileText) ]
p1,p2,p3 = re.findall("(.*):",fileText)
qb=q1+q2
qc=q1+q2+q3

print("This BLUEPRINT CONTAINS--------------|")
print(p1+" Questions: "+q1)

This code above is giving an error of line: print(p1+" Questions: "+q1) but print(p1+" Questions: "+p1) is giving correct output abd also print("q1") but combining them is outputting an error

but gives error print("questions: "+q1) This code opens a txt file which contains the following:

Part A: 12 10*2 = 20
Part B: 6 4*5 = 20
Part C: 5 3*10 = 30

Answer 1

You need to convert to a string with str :

print(p1 + " Questions: " + str(q1))

Alternatively, simply use multiple arguments when calling print :

print(p1, "Questions:", q1)

Note that the spaces are added automatically with this method.

Answer 2

Another way to do this is with something called f-strings (available in Python 3.6+, but the latest version is 3.7):

print (f"{p1} Questions: {q1}")

Notice how there is an f before the quotes (applies to all types of quotes), and any variable you want has to be in {}

Answer 3

The problem is in the types of your variables.

Questions: , p1 , p2 and p3 are all of type str .

Conversely, q1 , q2 and q3 are of type int .

The print calls work separately because print can convert its arguments to str . However, you are first trying to add two strings ( p1 and Questions: ) to an int ( q2 ), which is what fails.

Rather than naive addition/concatenation, you should prefer str.format calls:

print('{p} Questions: {q}'.format(p=p1, q=q1))

These make it easier to understand what the string will look like and automatically perform conversion of your arguments.

Answer 4

Python is strongly typed language. In most cases, it does not do any implicit type conversion. Consider, should "5"+7 be 12 or "57"? How about 7+"5"?

On ambiguous cases like this, Python will simply raise error rather than trying to guess what you meant.

You need to do the type conversion explicitly:

print(p1+" Questions: "+str(q1))

or with Python 3 f-string:

print(f"{p1} Questions: {q1}")

or print function accepts multiple arguments, that will, by default, be separated by space:

print(p1, "Questions:", q1)