cos: "Integer Required"?!?!?!?

[moonman]

Hello all,

I've just jumped into Python trying to develop X-Plane plugins.

All was chugging along well until I tried to use math.cos()

snippet:

import math

.....

cos_phi = math.cos(math.radians(XPLMGetDataf(self.ACphi))) # Error
occurs here

Now XPLMGetDataf should be returning float.

Is there something that I'm completely missing about how Python does
tyonig or something?

Thanks in advance,

Moonman

[Fredrik Lundh]

moonman wrote:

import math

....

cos_phi = math.cos(math.radians(XPLMGetDataf(self.ACphi))) # Error
occurs here
what error ? it's a lot easier to help if you include the traceback.
Now XPLMGetDataf should be returning float.
should be ? have you verified this ? try adding

print self.ACphi, type(self.ACphi)
value = XPLMGetDataf(self.ACphi)
print value, type(value)

before the cos_phi line, and let us know what it prints.
Is there something that I'm completely missing about how Python does
tyonig or something?

not necessarily, but you may need to work a little on your trouble-
shooting skills (rule 1: when in doubt, use print. print is your friend).

</F>

[Larry Bates]

First: Always post cut-paste tracebacks so we can see actual
error message.

Second: print out self.ACphi, XPLMGetDataf(self.ACphi) and
math.radians(XPLMGetDataf(self.ACphi)) before this statement
and you will find the problem.

-Larry Bates
moonman wrote:

Hello all,

I've just jumped into Python trying to develop X-Plane plugins.

All was chugging along well until I tried to use math.cos()

snippet:

import math

....

cos_phi = math.cos(math.radians(XPLMGetDataf(self.ACphi))) # Error
occurs here

Now XPLMGetDataf should be returning float.

Is there something that I'm completely missing about how Python does
tyonig or something?

Thanks in advance,

Moonman

[moonman]

print self.ACphi, type(self.ACphi) yields:
19412557 <type 'int'>

value = XPLMGetDataf(self.ACphi); print value type(value ) yields:
-0.674469709396 <type 'float'>

print math.radians(XPLMGetDataf(self.ACphi)),
type(math.radians(XPLMGetDataf(self.ACphi))) yields:

TypeError
:
an integer is required

Am I totally missing something about 'math'. Does it really expect an
int?
Moonman

Larry Bates wrote:

First: Always post cut-paste tracebacks so we can see actual
error message.

Second: print out self.ACphi, XPLMGetDataf(self.ACphi) and
math.radians(XPLMGetDataf(self.ACphi)) before this statement
and you will find the problem.

-Larry Bates
moonman wrote:

Hello all,

I've just jumped into Python trying to develop X-Plane plugins.

All was chugging along well until I tried to use math.cos()

snippet:

import math

....

cos_phi = math.cos(math.radians(XPLMGetDataf(self.ACphi))) # Error
occurs here

Now XPLMGetDataf should be returning float.

Is there something that I'm completely missing about how Python does
tyonig or something?

Thanks in advance,

Moonman

[Fredrik Lundh]

moonman wrote:

print self.ACphi, type(self.ACphi) yields:
19412557 <type 'int'>

value = XPLMGetDataf(self.ACphi); print value type(value ) yields:
-0.674469709396 <type 'float'>

print math.radians(XPLMGetDataf(self.ACphi)),
type(math.radians(XPLMGetDataf(self.ACphi))) yields:

TypeError
:
an integer is required

Am I totally missing something about 'math'. Does it really expect an
int?

nope.

import math
math.radians(-0.6744) -0.011770500475449759 math.cos(-0.1177)

0.99308134771019019

when you end up with exceptions that make no sense at all, and C
extensions are involved, the problem is quite often that some code in
the extension forgets to check for errors, or forgets to reset the
exception status when it has handled an error.

do you get any further if you do:

value = XPLMGetDataf(self.ACphi)
hasattr(value, "foo") # reset the exception status
print math.radians(value)

?

</F>

[Mikael Olofsson]

moonman wrote:

print self.ACphi, type(self.ACphi) yields:
19412557 <type 'int'>

value = XPLMGetDataf(self.ACphi); print value type(value ) yields:
-0.674469709396 <type 'float'>

print math.radians(XPLMGetDataf(self.ACphi)),
type(math.radians(XPLMGetDataf(self.ACphi))) yields:

TypeError
:
an integer is required

Am I totally missing something about 'math'. Does it really expect an
int?

Not my Python:

math.radians(-0.674469709396)

-0.011771717133929535

This all seems very confusing. Have you tried exactly the above?

Do you perhaps have a module of your own called math, that Python might
be importing? Or is your math not a module, but some other object that
happens to have a method called radians, that expects an int? Or have
you accidentally redefined math.radians?

/MiO

[moonman]

I'm using ActiveState PythonV2.4.1

I'm certainly not affecting 'math'. I wonder if the XPlane SDK Python
binding is touching anything.

I'll download the latest ActiveState Python and keep on plugging.

Thanks!
Mikael Olofsson wrote:

moonman wrote:

print self.ACphi, type(self.ACphi) yields:
19412557 <type 'int'>

value = XPLMGetDataf(self.ACphi); print value type(value ) yields:
-0.674469709396 <type 'float'>

print math.radians(XPLMGetDataf(self.ACphi)),
type(math.radians(XPLMGetDataf(self.ACphi))) yields:

TypeError
:
an integer is required

Am I totally missing something about 'math'. Does it really expect an
int?

Not my Python:

>>> math.radians(-0.674469709396)

-0.011771717133929535

This all seems very confusing. Have you tried exactly the above?

Do you perhaps have a module of your own called math, that Python might
be importing? Or is your math not a module, but some other object that
happens to have a method called radians, that expects an int? Or have
you accidentally redefined math.radians?

/MiO

[moonman]

It appears that the cause of this problem was indirect.

I input something incorrect as an argument to an xplane sdk function
and the cos/integer type error followed.

Thanks for the help. The diagnostic functions I learned in this thread
will be very helpful in the future.
moonman wrote:

I'm using ActiveState PythonV2.4.1

I'm certainly not affecting 'math'. I wonder if the XPlane SDK Python
binding is touching anything.

I'll download the latest ActiveState Python and keep on plugging.

Thanks!
Mikael Olofsson wrote:

moonman wrote:

print self.ACphi, type(self.ACphi) yields:
19412557 <type 'int'>

value = XPLMGetDataf(self.ACphi); print value type(value ) yields:
-0.674469709396 <type 'float'>

print math.radians(XPLMGetDataf(self.ACphi)),
type(math.radians(XPLMGetDataf(self.ACphi))) yields:

TypeError
:
an integer is required

Am I totally missing something about 'math'. Does it really expect an
int?

Not my Python:

>>> math.radians(-0.674469709396)

-0.011771717133929535

This all seems very confusing. Have you tried exactly the above?

Do you perhaps have a module of your own called math, that Python might
be importing? Or is your math not a module, but some other object that
happens to have a method called radians, that expects an int? Or have
you accidentally redefined math.radians?

/MiO