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Relative imports in Python 2.7
...vel module, regardless of where the module is actually located on the file system.
Relative imports...
Relative imports use the module's name to determine where it is in a package. When you use a relative import like from .. import foo, the dots indicate to step up some number of levels in the p...
Import a module from a relative path
...ted with python execute instead of opening a new interpreter.
import os, sys, inspect
# realpath() will make your script run, even if you symlink it :)
cmd_folder = os.path.realpath(os.path.abspath(os.path.split(inspect.getfile( inspect.currentframe() ))[0]))
if cmd_folder not in sys.path:
...
How to list imported modules?
...
import sys
sys.modules.keys()
An approximation of getting all imports for the current module only would be to inspect globals() for modules:
import types
def imports():
for name, val in globals().items():
if isinstanc...
How do I find a default constraint using INFORMATION_SCHEMA?
...ying to test if a given default constraint exists. I don't want to use the sysobjects table, but the more standard INFORMATION_SCHEMA.
...
multiple prints on the same line in Python
...
You can use the print statement to do this without importing sys.
def install_xxx():
print "Installing XXX... ",
install_xxx()
print "[DONE]"
The comma on the end of the print line prevents print from issuing a new line (you should note that there will be an extra space at ...
How to read a single character from the user?
...elf.impl()
class _GetchUnix:
def __init__(self):
import tty, sys
def __call__(self):
import sys, tty, termios
fd = sys.stdin.fileno()
old_settings = termios.tcgetattr(fd)
try:
tty.setraw(sys.stdin.fileno())
ch = sys.stdin.rea...
Python exit commands - why so many and when should each be used?
... stop script execution. The choices I've found are: quit() , exit() , sys.exit() , os._exit()
4 Answers
...
How do I see active SQL Server connections?
...
when you have to filter for specific db selecting from sys.sysprocesses is better
– Iman
Dec 2 '13 at 4:29
2
...
Display help message with python argparse when script is called without any arguments
...override the default behavior of the error method:
import argparse
import sys
class MyParser(argparse.ArgumentParser):
def error(self, message):
sys.stderr.write('error: %s\n' % message)
self.print_help()
sys.exit(2)
parser = MyParser()
parser.add_argument('foo', nargs...
Add primary key to existing table
...g the query below:
select OBJECT_NAME(OBJECT_ID) AS NameofConstraint
FROM sys.objects
where OBJECT_NAME(parent_object_id)='Persion'
and type_desc LIKE '%CONSTRAINT'
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