(Just as a collection, easy to use)
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Question: Python search for path-forward issues:
My current project has two catalogues.
base/
Among them are logger.py
tests/
of which tests/testlogger.py
Import base. Logger
Perform
#pythone tests/testlogger.py
I can't find the logger module.
If the tests/testlogger.py CP to the upper directory can be useful
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Import Sys
Sys.path.append ('.. ')
Import base. Logger
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Question: How Python iterates through all the files in a folder and invokes the EXE file with parameters.
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Import OS, re
def enum_exe (ARG, dirname, names):
For name in Names:
If Re.search (R '/.exe$ ', Name.lower ()):
Dosomthing (dirname + "//" + name)
Os.path.walk (".", Enum_exe, ())
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Import Glob
Filelist=glob.glob ("E://pythonwork/*.exe")
For filename in filelist:
Call filename with parameter
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For Root, dirs, the files in Os.walk (path, topdown=false):
#hanlde file
For name in Files:
If name[:-3] = ' exe ':
Print Name
For subfolder in dirs:
Print subfolder
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Range () function:
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The range () function can generate a arithmetic progression. For example, the result of a range (n) is a list of all integers in [m,n] with a list,range (m,n) result that contains all the integers in the 0~n-1, and Range (M,n,d) just represents the list that starts with M, and does not exceed the n-1 with D as the tolerance.
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Break and continue statements, and ELSE statements that are used with the Loop statement:
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The function of break and continue is the same as in C language.
It is noteworthy that the for and while statements can be paired with the else-guided statement. Obviously, it means that the operation is performed when the cyclic condition is no longer valid. The example in the document is a program that determines whether each integer in [2,10] is a prime number.
For n in range (2,10):
For x in range (2,n):
If n%x==0:
Print n, ' equals ', X, ' * ', n/x
Break
Else
Print N, ' is a prime number '
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How python can get a path to the imported module:
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>>> Import WxPython
>>> Import Imp
>>> imp.find_module ("WxPython")
(None, ' C://python25//lib//site-packages//wx-2.6-msw-unicode//wxpython ', (",", 5))
>>>
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>>> Import Telnetlib
>>> telnetlib.__file__
' e://python25//lib//telnetlib.py '
>>>
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How to get the current application path in Python:
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Import OS
Print Os.path.abspath (Os.curdir)
Print Os.path.abspath ('. ')
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Os.chdir (path) # change Dir
OS.GETSWD () # display Dir
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PYTHON and C interact with each other to invoke instance resolution:
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Pre-use tools:
VC + + Compiler
Python Interpreter
If not installed VC, you can go to Microsoft's next C + + compiler, address is as follows:
Http://download.microsoft.com/download/3/9/b/39bac755-0a1e-4d0b-b72c-3a158b7444c4/VCToolkitSetup.exe
After loading, add the python include and libs in the environment variable to the following 2 macros
INCLUDE
Lib
1, c call python
#include <Python.h>
int main (int argc, char *argv[])
{
Py_initialize ();
Pyrun_simplestring ("From time import time,ctime/n")
' Print ' is ', CTime (Time ())/n ');
Py_finalize ();
return 0;
}
Compiling directly with the CL file name is
2, use C to generate a DLL, with Python call
C code: such as FOO.C
#include <Python.h>
/* Define the method table. */
Static Pyobject *foo_bar (Pyobject *self, Pyobject *args);
Static Pymethoddef foomethods[] = {
{"Bar", Foo_bar, Meth_varargs},
{NULL, NULL}
};
/* here ' s the initialization function. We don ' t need to do anything
For our own needs, but Python needs this method table. */
void Initfoo ()
{
(void) Py_initmodule ("foo", Foomethods);
}
/* Finally, let's do something ... involved ... as an example function. */
Static Pyobject *foo_bar (Pyobject *self, Pyobject *args)
{
Char *string;
int Len;
if (! Pyarg_parsetuple (args, "s", &string))
return NULL;
Len = strlen (string);
Return Py_buildvalue ("I", Len);
}
C Definition File: Foo.def
Exports
Initfoo
Compile Build Foo.dll
Cl-c foo.c;
Link Foo.obj/dll/def:foo.def/out:foo.dll
Called in Python:
Import Foo
Dir (foo)
...
You can see the result:
>>> Import foo
>>> dir (foo)
[' __doc__ ', ' __file__ ', ' __name__ ', ' Bar ']
>>>
