I have some difficulty with the abovet. I succeeded after a fashion, but only
after some experiment, and I am not satisfied that all is well.
Here is the script code (as per the Python tutorial 6.1.1.):
def fib(n): # write Fibonacci series up to n
a, b = 0, 1
while b < n:
print b,
a, b = b, a+b
def fib2(n): # return Fibonacci series up to n
result = []
a, b = 0, 1
while b < n:
result.append(b)
a, b = b, a+b
return result
if __name__ == "__main__":
import sys
fib(int(sys.argv[1]))
It is saved in the current directory as fibo.py with the current directory
being:
/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/
The module executes ok when imported but not as a script.
Terminal returns:
Apples-iMac-4:~ apple$ python fibo.py 50
/opt/local/Library/Frameworks/Python.framework/Versions/2.7/Resources/Python.app/Contents/MacOS/Python:
can't open file 'fibo.py': [Errno 2] No such file or directory
Apples-iMac-4:~ apple$
However, Python appears to be searching the correct directories:
>>> import sys
>>> sys.path
['',
'/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python27.zip',
'/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7',
'/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-darwin',
'/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac',
'/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac/lib-scriptpackages',
'/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk',
'/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-old',
'/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload',
'/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages',
'/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/gtk-2.0']
And. . . if I open the same script with: right click > Open with > Python
Launcher.app (2.7.6) I get:
Last login: Wed Dec 4 20:52:15 on ttys002
Apples-iMac-4:~ apple$ cd
'/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/' &&
'/usr/bin/pythonw'
'/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/fibo.py'
&& echo Exit status: $? && exit 1
Traceback (most recent call last):
File
"/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/fibo.py",
line 21, in <module>
fib(int(sys.argv[1]))
IndexError: list index out of range
Then . . . if I then use this same window to call the script it runs:
Apples-iMac-4:python2.7 apple$ python fibo.py 50
1 1 2 3 5 8 13 21 34
Apples-iMac-4:python2.7 apple$
Je suis perplexed!
-A
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