Develop Reference

Need to make str method return string instead of printing

I need the below str method written to return a string rather than print a string.
def __str__(self):
"""Returns the string representation of the student."""
avg = sum(self.scores) / len(self.scores)
print("Name: " + str(self.name))
print("Score 1: " + str(self.scores[0]))
print("Score 2: " + str(self.scores[1]))
print("Score 3: " + str(self.scores[2]))
print("High: " + str(int(max(self.scores))))
print("Average: %.2f\n" % avg)

What you want to do is convert all those print statements into one string, while maintaining the newlines that you already have.
Something like this should work in place of str
def __str__(self):
avg = sum(self.scores) / len(self.scores)
s = ""
s += "Name: " + str(self.name) + "\n"
s += "Score 1: " + str(self.scores[0]) + "\n"
s += "Score 2: " + str(self.scores[1]) + "\n"
s += "Score 3: " + str(self.scores[2]) + "\n"
s += "High: " + str(int(max(self.scores))) + "\n"
s += "Average: %.2f\n" % avg + "\n"
return s

Type Error: unsupported operand type(s) for +: 'NoneType' and 'str' exit status 1

I keep editing my text but I keep on getting the same error!
My code:
import random
Female_Characters = ["Emily", "Ariel", "Jade", "Summer"]
Male_Characters = ["Blake", "Max", "Jack", "Cole", "Daniel"]
PlacesToMeet = ["Beach", "Park", "Train Station", "Cave"]
SheSaid = ["Lets go explore!", "I'm tired", "I saw a purple frog", "My tounge hurts"]
HeSaid = ["I didnt get much sleep", "I wanna go inside that cave!", "Oh, ok"]
Outcomes = ["They never got to", "They were never found again.", "They enjoyed their day and went to
get Ice Cream!"]
ChosenFemale = random.choice(Female_Characters)
ChosenMale = random.choice(Male_Characters)
ChosenMeet = random.choice(PlacesToMeet)
ChosenShesaid = random.choice(SheSaid)
ChosenHeSaid = random.choice(HeSaid)
print ("There were two friends, their names are ") + (ChosenMale) + (", and ") + (ChosenFemale) + (".") + ("One day when they were at the") + (ChosenMeet) + (", ") + (ChosenFemale) + (" Said, ") + (ChosenShesaid) + (". Then") + (ChosenMale) + (" Said ") + (ChosenHeSaid) + (". After that, ") + random.choice(Outcomes)
Still new to python

You have incorrect parentheses on the print line.
print("There were two friends, their names are " + ChosenMale + ", and " + ChosenFemale + "." + "One day when they were at the" + ChosenMeet + ", " + ChosenFemale + " Said, " + ChosenShesaid + ". Then" + ChosenMale + " Said " + ChosenHeSaid + ". After that, " + random.choiceOutcomes)
Your code was calling
print("There were two friends, their names are ")
which returns None, and then trying to concatenate that with all the other strings.
Maybe you were following Python 2.x instructions. In Python 2, print is a statement so it didn't take an argument in parentheses, but in Python 3 it's an ordinary function.

remove the parenthesis at the end of this string
print("There were two friends, their names are "
and add it at the end of
random.choice(Outcomes)
so it should be:
print ("There were two friends, their names are " + (ChosenMale) + (", and ") + (ChosenFemale) + (".") + ("One day when they were at the") + (ChosenMeet) + (", ") + (ChosenFemale) + (" Said, ") + (ChosenShesaid) + (". Then") + (ChosenMale) + (" Said ") + (ChosenHeSaid) + (". After that, ") + random.choice(Outcomes))

I can't add a space on my output on python

I want a space on the Farhan Sadik and Snigdho
I tried this many times on spacing Name, Name2, Welcome but there is no result.

Actually you concatenante your strings with no space between them.
You can do:
print("Hi", name1, name2, welcome)
or:
print("Hi " + name1 + " " + name2 + " " + welcome)

You can simply solve this, adding a space:
Name + " " + Name2 + " " + third_variable

print(Name + " " + Name2 + " " + "WELCOME")
OUTPUT:
Value of Name value of name2 WELCOME
If comma(,) is used in the place of " " it will also give the same output (as above)
The above code prints the value of name and a space (" ") and again name2 and a space (" ") and the string "WELCOME".
In the same way if you use \n in the space of " " you will get the output of the string or variable next to the \n in a new line. For example:
print(Name + "\n" + Name2 + "\n" + "WELCOME")
Output:
Value of Name
Value of Name2
WELCOME
In the same way if \t is used in the place of \n it will print the variable or string next to it after a tab space, like:
Output:
Value of Name Value of Name2 WELCOME

How do I display an entire object that matches my search by an attribute of that object in Python?

I am writing a program that keeps track of the animals on a farm and I want to be able to search for an animal by e.g: name, gender, age etc, which all are attributes to the objects. I am a complete noob when it comes to Python so all help is very appreciated.
Here is the code i have so far for this, but it only ads the attribute that is searched for to the list and then prints it. I want to be able to add the entire object to the list and print the whole object through that list.
class Djur:
def __init__(self, art, namn, ålder, kön, gravid):
self.art = art
self.namn = namn
self.age = ålder
self.gender = kön
self.gravid = gravid
def __str__(self):
return ("Art: " + str(self.art) + " " + "\n"
"Namn: " + str(self.namn) + " " + "\n"
"Ålder: " + str(self.age) + " " + "\n"
"Kön: " + str(self.gender) + " " + "\n"
"Gravid: " + str(self.gravid))
def __repr__(self):
return str(self)
try:
val2 = input("Ange sök-text")
l=[]
for x in djurlista:
y = x.art or x.gender or x.namn or x.gravid or x.age
if y == val2:
l.append(x.art)
print(l)
meny()
except ValueError:
print("Var god välj ett giltigt alternativ!")

To create a list with the objects you just need to write l.append(x) instead of l.append(x.art). Now you are just appending the property art.

python ParseError: Bad Input on line

ok so I a trying to make a calculator in python and it comes up with ParseError: Bad Input on line 7 and ParseError: Bad Input on line 6 etc. all the way down to ParseError: Bad Input on line 1, can anyone spot the error and how to fix it.
1:) n = input(" select first number: ")
2:) d = raw_input("What operation: ")
3:) print " What operation: " + str(d)
4:) n1 = input(" select second number ")
6:) if d == "+":
7:) print "Did you know that " + str(n) + " plus " + str(n1) + " is "
7:) + str(n+n1)+ "?"
8:)
9:)print " "
10:)print "Goodbye"

The line:
print "Did you know that " + str(n) + " plus " + str(n1) + " is "
will happily print something. Then the interpreter sees this:
+ str(n+n1)+ "?"
and has no idea what you mean, because it doesn't know you're continuing the previous line's print statement. You can fix this by adding parentheses:
>>> print ("Did you know that " + str(1) + " plus " + str(1) + " is "
... + str(2)+ "?")
Did you know that 1 plus 1 is 2?
Now the interpreter knows that, when you finish that first line, you're not done entering the expression. It will wait for you to finish a valid statement before processing it. See also logical lines and physical lines in Python.