/usr/lib/python2.7/dist-packages/qgis/user.py is in python-qgis 2.8.6+dfsg-1build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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import sys
import glob
import traceback
from PyQt4.QtCore import QCoreApplication
from qgis.core import QgsApplication, QgsMessageLog
def load_user_expressions(path):
"""
Load all user expressions from the given paths
"""
#Loop all py files and import them
modules = glob.glob(path + "/*.py")
names = [os.path.basename(f)[:-3] for f in modules]
for name in names:
if name == "__init__":
continue
# As user expression functions should be registered with qgsfunction
# just importing the file is enough to get it to load the functions into QGIS
try:
__import__("expressions.{0}".format(name), locals(), globals())
except:
error = traceback.format_exc()
msgtitle = QCoreApplication.translate("UserExpressions", "User expressions")
msg = QCoreApplication.translate("UserExpressions", "The user expression {0} is not valid").format(name)
QgsMessageLog.logMessage(msg +"\n"+ error, msgtitle, QgsMessageLog.WARNING)
userpythonhome = os.path.join(QgsApplication.qgisSettingsDirPath(), "python")
expressionspath = os.path.join(userpythonhome, "expressions")
startuppy = os.path.join(userpythonhome, "startup.py")
sys.path.append(userpythonhome)
# exec startup script
if os.path.exists(startuppy):
execfile(startuppy, locals(), globals())
if not os.path.exists(expressionspath):
os.makedirs(expressionspath)
initfile = os.path.join(expressionspath, "__init__.py")
if not os.path.exists(initfile):
open(initfile, "w").close()
import expressions
expressions.load = load_user_expressions
expressions.load(expressionspath)
expressions.template = """\"\"\"
Template function file. Define new functions using @qgsfunction.
When using args="auto" you may define a new variable for each value for the function.
feature and parent must always be the last args.
To pass a any number of args into a function use args=-1 the first
variable will then be a list of values.
\"\"\"
from qgis.core import *
from qgis.gui import *
@qgsfunction(args="auto", group='Custom')
def func(value1, feature, parent):
pass
"""
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