CODEWITHSUNDEEP
pythonprintingformat
Riuk2252
Riuk2252

Reputation: 17

How to solve: ValueError: Invalid format specifier?

h=1
m=1
s=30
k=5
ks = ((h * 60) + m + (s / 60)) / k
s=(ks - int(ks)) * 0.6
print(f'0{ks:.0f}:{s:.2f:.02}')

I am trying run the code, but i recieve the error: ValueError: Invalid format specifier

Upvotes: -1

Views: 9003

Answers (3)

george njue
george njue

Reputation: 1

If you happen to work with classMethods in Python and you want to round to the nearest 2dp, this ValueError appears if you have a space after {count:.2f}; check this code for example

class Student:
    count = 0
    total_gpa = 0

    def __init__(self, name, gpa):
        self.name = name
        self.gpa = gpa
        Student.count += 1
        Student.total_gpa += gpa
    
    #instance method        
    def get_info(self):
        return f"{self.name} {self.gpa}"
     #class method  
    @classmethod

    def get_count(cls):
        return f"Total # of students : {cls.count}"

    @classmethod

    def get_average_gpa(cls):
        if cls.count == 0:
            return 0
        
        else: 
            return f"{cls.total_gpa / cls.count:.2f }"
    


student1 = Student("Njue", 2.4)
student2 = Student("John", 3.5)
student3 = Student("Mary", 4.0)

print(Student.get_count())
print(Student.get_average_gpa())

#return f"{cls.total_gpa / cls.count:.2f }" the space after f will have 
this error hence clear the whitespace

Upvotes: 0

Евгений Веснин
Евгений Веснин

Reputation: 11

f'{dt.hour}:{dt.minute}:{dt.second+dt.microsecond/1e6:.3f}'

Upvotes: 0

FLAK-ZOSO
FLAK-ZOSO

Reputation: 4137

ValueError: Invalid format specifier '.2f:.02' for object of type 'float'

This is the full error, simply you can't use 2f:.02 as specifier in brackets.

>>> print(f'0{ks:.0f}:{s:.2f}')
012:0.18

This is a sample output changing the specifier in brackets.

Upvotes: 1

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