You will face the “Typeerror: Not All Arguments Converted During String Formatting” during your work on the Python project. This post will classify the main cause, and solutions related to this error. 

When will the “Typeerror: Not All Arguments Converted During String Formatting” occur?

This error will happen when you are combining various format specifiers. In this example, this error will display when you are attempting to compare the input value with another value. 

Enter Your Age: 17
Traceback (most recent call last):
  File "f:\Python Script\Python\2021\temp.py", line 9, in <module>
    print ("Your Age is '{0}' Which is Less Than '{1}' So That You Are Not Eligible"% age, "20")
TypeError: not all arguments converted during string formatting

Here is the main cause of this error:

The error is due to when Python programming language can not transform all arguments to the string format operation. 

How to fix this error?

Approach 1: Apply for the ‘%’ operator

You need to use the ‘%’ operator by implementing a printf-style format string for string formatting. 

age = input("Enter Your Age: ")
if age <= "20":
    print ("Your Age is '%s' Which is less than '%s' So That You are not eligible" % (age, 20).
else:
print("Eligible")

Then, run the program and check the result. 

Enter Your Age: 15
Your Age is '15' Which is less than '20' So That You are not eligible.

Now, this error is solved completely. 

Approach 2: Use “.format”

You should use the “.format” structure in this case.  Next, you add “.format” into your code below. 

age = input("Enter Your Age: ")
if age <= "20":
    print ("Your Age is '{0}' Which is less than '{1}' So That You are not eligible ".format(age, 20))
else:
print("Eligible") 

Finally, run the program and check the result. 

Enter Your Age: 17
Your Age is '17' Which is less than '20' So That You are not eligible.

At this time, this error is removed entirely. 

Approach 3: Use f-strings

The final solution is that you apply for “f-strings” in your code. You have to follow the syntax below. 

username = "Long"
userage = 25
print(f"Username is {username} and Age is {userage}.")
Username is Long and Age is 25. # OUTPUT

Pretty cool! The “Typeerror: Not All Arguments Converted During String Formatting” is tackled successfully. 

Conclusion

We believe that you know how to fix the “Typeerror: Not All Arguments Converted During String Formatting” after browsing this post. Let’s keep in touch with us if needed. Thank you! 

Read more:

→ “Typeerror: String Argument Without An Encoding” – How To Solve It?