: https://www.edx.org/course/mit/6-00-1x/introduction-computer-science/1122 
Topic: Programming in Python (Read 2734 times)
I found another course but this one use a real interpreter : https://www.edx.org/course/mit/6-00-1x/introduction-computer-science/1122
: https://www.edx.org/course/mit/6-00-1x/introduction-computer-science/1122 Traceback (most recent call last):
File "test.py", line 13, in
print miles_input + " miles = " + str(miles_to_km_no_float(miles_input)) + " km (no float)"
TypeError: unsupported operand type(s) for +: 'int' and 'str'
intFile "test.py", line 13, in
print miles_input + " miles = " + str(miles_to_km_no_float(miles_input)) + " km (no float)"
TypeError: unsupported operand type(s) for +: 'int' and 'str'
str
Fix
Quote
print str(miles_input) + " miles = " + str(miles_to_km_no_float(miles_input)) + " km (no float)"
It's already been done.
I've started the course once again.
Traceback (most recent call last):
File "test.py", line 13, in
print miles_input + " miles = " + str(miles_to_km_no_float(miles_input)) + " km (no float)"
TypeError: unsupported operand type(s) for +: 'int' and 'str'
intFile "test.py", line 13, in
print miles_input + " miles = " + str(miles_to_km_no_float(miles_input)) + " km (no float)"
TypeError: unsupported operand type(s) for +: 'int' and 'str'
str
Fix
Quote
print str(miles_input) + " miles = " + str(miles_to_km_no_float(miles_input)) + " km (no float)"
There was a thread on this forum with different things people created with python.
I need to learn python
Jump aboard with this course! I'm pretty much a beginner so we can assist one another via this thread
I'm dedicating 1-2 hours a day to this, just need to make it habit for it to stick in my mind otherwise I'll forget.Will do. Coursera seems to have other awesome courses too.
So, unless you want to draw erroneous conclusions about how to program, as has become glaringly obvious in this little episode, I suggest you only test your code using your local python interpreter.
I don't know if this is related but it only uses the libraries we need to complete the course.
I need to learn python
Jump aboard with this course! I'm pretty much a beginner so we can assist one another via this thread
I'm dedicating 1-2 hours a day to this, just need to make it habit for it to stick in my mind otherwise I'll forget.
I need to learn python
I'm pretty sure I know what your problem is. First, what version of Python are you using. Type python at the command prompt.
There is no command prompt. It's a web browser implementation for the course. It works fine with codeskulptor but throw an error with python 2.7.3 on my computer.
Code:
Traceback (most recent call last):
File "test.py", line 13, in
print miles_input + " miles = " + str(miles_to_km_no_float(miles_input)) + " km (no float)"
TypeError: unsupported operand type(s) for +: 'int' and 'str'
File "test.py", line 13, in
print miles_input + " miles = " + str(miles_to_km_no_float(miles_input)) + " km (no float)"
TypeError: unsupported operand type(s) for +: 'int' and 'str'
for the print command, intead of adding a bunch of things together, it might be better to use placeholders?
Code:
print "%f miles = %f km." % (miles_input, miles_to_km_no_float(miles_input))
Yes. Such power using C style printf printing. Read up on formatting for printf.
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It's all fun and games until somebody loses an eye
I'm pretty sure I know what your problem is. First, what version of Python are you using. Type python at the command prompt.
There is no command prompt. It's a web browser implementation for the course. It works fine with codeskulptor but throw an error with python 2.7.3 on my computer.
Code:
Traceback (most recent call last):
File "test.py", line 13, in
print miles_input + " miles = " + str(miles_to_km_no_float(miles_input)) + " km (no float)"
TypeError: unsupported operand type(s) for +: 'int' and 'str'
File "test.py", line 13, in
print miles_input + " miles = " + str(miles_to_km_no_float(miles_input)) + " km (no float)"
TypeError: unsupported operand type(s) for +: 'int' and 'str'
for the print command, intead of adding a bunch of things together, it might be better to use placeholders?
Code:
print "%f miles = %f km." % (miles_input, miles_to_km_no_float(miles_input))
Code:
def miles_to_km(miles):
return miles * 1.60934
miles_input = input('Please input miles to convert in km: ')
print miles_to_km(float(miles_input))
return miles * 1.60934
miles_input = input('Please input miles to convert in km: ')
print miles_to_km(float(miles_input))
What's likely happening here is that when querying for input, you're getting a string. What you want is a number. You don't know if the string, when converted to a number, has a decimal place or not, so you take the safe route and convert it to a float. But this is all about preparing the arguments for the function.
The function should expect a number (int or float) and receive that.
Even further proof: here we're guaranteeing that we're passing an integer into the function:
Code:
def miles_to_km(miles):
return miles * 1.60934
print miles_to_km(int(1))
return miles * 1.60934
print miles_to_km(int(1))
Yes, I know this is how I did it the first time but it doesn't works using input() in the online version.
Even further proof: here we're guaranteeing that we're passing an integer into the function:
Code:
def miles_to_km(miles):
return miles * 1.60934
print miles_to_km(int(1))
return miles * 1.60934
print miles_to_km(int(1))
So, unless you want to draw erroneous conclusions about how to program, as has become glaringly obvious in this little episode, I suggest you only test your code using your local python interpreter.
I will; however, the online interpreter is the only way to submit our work for the course.
Even so, the function was not the problem. Run this online:
Code:
def miles_to_km(miles):
return miles * 1.60934
print miles_to_km(1)
return miles * 1.60934
print miles_to_km(1)
So, unless you want to draw erroneous conclusions about how to program, as has become glaringly obvious in this little episode, I suggest you only test your code using your local python interpreter.
I will; however, the online interpreter is the only way to submit our work for the course.
So, unless you want to draw erroneous conclusions about how to program, as has become glaringly obvious in this little episode, I suggest you only test your code using your local python interpreter.
Whatever the case, you don't need to convert your integer to a float in the function, because multiplying it by a float already does that.
Also, I can't get a program to print the Python version to work in the online version.
For example, this does not work:
import platform
print(platform.python_version())
Also, I can't get a program to print the Python version to work in the online version.
For example, this does not work:
import platform
print(platform.python_version())
I think it's an incomplete version 2.
Whatever the case, you don't need to convert your integer to a float in the function, because multiplying it by a float already does that.
Also, I can't get a program to print the Python version to work in the online version.
For example, this does not work:
import platform
print(platform.python_version())
Also, I can't get a program to print the Python version to work in the online version.
For example, this does not work:
import platform
print(platform.python_version())
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