/
udfs.py
256 lines (223 loc) · 9.57 KB
/
udfs.py
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import os
import re
import os.path
import tempfile
def xlfunc(f=None, **kwargs):
def inner(f):
if not hasattr(f, "__xlfunc__"):
xlf = f.__xlfunc__ = {}
xlf["name"] = f.__name__
xlf["sub"] = False
xlargs = xlf["args"] = []
xlargmap = xlf["argmap"] = {}
nArgs = f.__code__.co_argcount
if f.__code__.co_flags & 4: # function has an '*args' argument
nArgs += 1
for vpos, vname in enumerate(f.__code__.co_varnames[:nArgs]):
xlargs.append({
"name": vname,
"pos": vpos,
"marshal": "var",
"vba": None,
"range": False,
"dtype": None,
"ndim": -1,
"doc": "Positional argument " + str(vpos+1),
"vararg": True if vpos == f.__code__.co_argcount else False
})
xlargmap[vname] = xlargs[-1]
xlf["ret"] = {
"marshal": "var",
"lax": True,
"doc": f.__doc__ if f.__doc__ is not None else "Python function '" + f.__name__ + "' defined in '" + str(f.__code__.co_filename) + "'."
}
return f
if f is None:
return inner
else:
return inner(f)
def xlsub(f=None, **kwargs):
def inner(f):
f = xlfunc(**kwargs)(f)
f.__xlfunc__["sub"] = True
return f
if f is None:
return inner
else:
return inner(f)
xlretparams = set(("marshal", "lax", "doc"))
def xlret(marshal=None, **kwargs):
if marshal is not None:
kwargs["marshal"] = marshal
def inner(f):
xlf = xlfunc(f).__xlfunc__
xlr = xlf["ret"]
for k, v in kwargs.items():
if k in xlretparams:
xlr[k] = v
else:
raise Exception("Invalid parameter '" + k + "'.")
return f
return inner
xlargparams = set(("marshal", "ndim", "dtype", "range", "doc", "vba"))
def xlarg(arg, marshal=None, ndim=None, **kwargs):
if marshal is not None:
kwargs["marshal"] = marshal
if ndim is not None:
kwargs["ndim"] = ndim
def inner(f):
xlf = xlfunc(f).__xlfunc__
if arg not in xlf["argmap"]:
raise Exception("Invalid argument name '" + arg + "'.")
xla = xlf["argmap"][arg]
for k, v in kwargs.items():
if k in xlargparams:
xla[k] = v
else:
raise Exception("Invalid parameter '" + k + "'.")
return f
return inner
udf_scripts = {}
def udf_script(filename):
filename = filename.lower()
mtime = os.path.getmtime(filename)
if filename in udf_scripts:
mtime2, vars = udf_scripts[filename]
if mtime == mtime2:
return vars
vars = {}
with open(filename, "r") as f:
exec(compile(f.read(), filename, "exec"), vars)
udf_scripts[filename] = (mtime, vars)
return vars
def import_udfs(script_path, xl_workbook):
tab = '\t'
tf = tempfile.NamedTemporaryFile(mode='w', delete=False)
f = tf.file
f.write('Attribute VB_Name = "xlwings_udfs"\n')
script_vars = udf_script(script_path)
for svar in script_vars.values():
if hasattr(svar, '__xlfunc__'):
xlfunc = svar.__xlfunc__
xlret = xlfunc['ret']
fname = xlfunc['name']
ftype = 'Sub' if xlfunc['sub'] else 'Function'
f.write(ftype + " " + fname + "(")
first = True
vararg = ''
n_args = len(xlfunc['args'])
for arg in xlfunc['args']:
if not arg['vba']:
argname = arg['name']
if not first:
f.write(', ')
if arg['vararg']:
f.write('ParamArray ')
vararg = argname
f.write(argname)
if arg['vararg']:
f.write('()')
first = False
f.write(')\n')
if ftype == 'Function':
f.write(tab + "If TypeOf Application.Caller Is Range Then On Error GoTo failed\n")
if vararg != '':
f.write(tab + "ReDim argsArray(1 to UBound(" + vararg + ") - LBound(" + vararg + ") + " + str(n_args) + ")\n")
j = 1
for arg in xlfunc['args']:
if not arg['vba']:
argname = arg['name']
if arg['vararg']:
f.write(tab + "For k = LBound(" + vararg + ") To UBound(" + vararg + ")\n")
argname = vararg + "(k)"
if not arg['range']:
f.write(tab + "If TypeOf " + argname + " Is Range Then " + argname + " = " + argname + ".Value2\n")
ndim = arg['ndim']
marshal = arg['marshal']
if ndim != -2 or marshal == "nparray" or marshal == "list":
f.write(tab + "If Not TypeOf " + argname + " Is Object Then\n")
if ndim != -2:
f.write(tab + tab + argname + " = NDims(" + argname + ", " + str(ndim) + ")\n")
if arg['marshal'] == "nparray":
dtype = arg['dtype']
if dtype is None:
f.write(tab + tab + 'Set ' + argname + ' = Py.Call(Py.Module("numpy"), "array", Py.Tuple(' + argname + '))\n')
else:
f.write(tab + tab + 'Set ' + argname + ' = Py.Call(Py.Module("numpy"), "array", Py.Tuple(' + argname + ', "' + dtype + '"))\n')
elif marshal == 'list':
f.write(tab + tab + 'Set ' + argname + ' = Py.Call(Py.Eval("lambda t: [ list(x) if isinstance(x, tuple) else x for x in t ] if isinstance(t, tuple) else t"), Py.Tuple(' + argname + '))\n')
f.write(tab + "End If\n")
if arg['vararg']:
f.write(tab + "argsArray(" + str(j) + " + k - LBound(" + vararg + ")) = " + argname + "\n")
f.write(tab + "Next k\n")
else:
if vararg != "":
f.write(tab + "argsArray(" + str(j) + ") = " + argname + "\n")
j += 1
if vararg != '':
f.write(tab + "Set args = Py.TupleFromArray(argsArray)\n")
else:
f.write(tab + "Set args = Py.Tuple(")
first = True
for arg in xlfunc['args']:
if not first:
f.write(", ")
if not arg['vba']:
f.write(str(arg['name']))
else:
f.write(str(arg['vba']))
first = False
f.write(")\n")
f.write(tab + 'Set xlpy = Py.Module("xlwings")\n')
f.write(tab + 'Set script = Py.Call(xlpy, "udf_script", Py.Tuple(PyScriptPath))\n')
f.write(tab + 'Set func = Py.GetItem(script, "' + fname + '")\n')
if ftype == "Sub":
f.write(tab + 'Py.SetAttr Py.Module("xlwings._xlwindows"), "xl_workbook_current", ThisWorkbook\n')
f.write(tab + "Py.Call func, args\n")
else:
f.write(tab + 'Py.SetAttr Py.Module("xlwings._xlwindows"), "xl_workbook_current", ThisWorkbook\n')
f.write(tab + "Set " + fname + " = Py.Call(func, args)\n")
marshal = xlret["marshal"]
if marshal == "auto":
f.write(tab + "If TypeOf Application.Caller Is Range Then " + fname + " = Py.Var(" + fname + ", " + str(xlret["lax"]) + ")\n")
elif marshal == "var":
f.write(tab + fname + " = Py.Var(" + fname + ", " + str(xlret["lax"]) + ")\n")
elif marshal == "str":
f.write(tab + fname + " = Py.Str(" + fname + ")\n")
if ftype == "Function":
f.write(tab + "Exit " + ftype + "\n")
f.write("failed:\n")
f.write(tab + fname + " = Err.Description\n")
f.write("End " + ftype + "\n")
f.write("\n")
tf.close()
try:
xl_workbook.VBProject.VBComponents.Remove(xl_workbook.VBProject.VBComponents("xlwings_udfs"))
except:
pass
xl_workbook.VBProject.VBComponents.Import(tf.name)
for svar in script_vars.values():
if hasattr(svar, '__xlfunc__'):
xlfunc = svar.__xlfunc__
xlret = xlfunc['ret']
xlargs = xlfunc['args']
fname = xlfunc['name']
fdoc = xlret['doc'][:255]
n_args = 0
for arg in xlargs:
if not arg['vba']:
n_args += 1
excel_version = [int(x) for x in re.split("[,\\.]", xl_workbook.Application.Version)]
if n_args > 0 and excel_version[0] >= 14:
argdocs = []
for arg in xlargs:
if not arg['vba']:
argdocs.append(arg['doc'][:255])
xl_workbook.Application.MacroOptions("'" + xl_workbook.Name + "'!" + fname, Description=fdoc, ArgumentDescriptions=argdocs)
else:
xl_workbook.Application.MacroOptions("'" + xl_workbook.Name + "'!" + fname, Description=fdoc)
# try to delete the temp file - doesn't matter too much if it fails
try:
os.unlink(tf.name)
except:
pass