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Getting SyntaxError for print with keyword argument end=' '
I have this python script where I need to run gdal_retile.py ,
but I get an exception on this line:
14 Answers
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How can I create a unique constraint on my column (SQL Server 2008 R2)?
...
Or set column as unique from the SQL Query window:
alter table location_key drop constraint pinky;
alter table your_table add constraint pinky unique(yourcolumn);
Changes take effect immediately:
Command(s) completed successfully.
...
实战低成本服务器搭建千万级数据采集系统 - 更多技术 - 清泛网 - 专注C/C++...
...器。到了机器后再按照天或者半天分表，比如表名为 weibo_2013020101 、weibo_2013020112。weibo_2013020101表示2月1日上午一个表，weibo_2013020112表示2月1日下午一个表。光这样分了还是不够，1000w/2=500w，经不起压力扩展。我们还需要把表再...
Mocking a class: Mock() or patch()?
...ake a look at this snippet:
>>> class MyClass(object):
... def __init__(self):
... print 'Created MyClass@{0}'.format(id(self))
...
>>> def create_instance():
... return MyClass()
...
>>> x = create_instance()
Created MyClass@4299548304
>>>
>>>...
How to add a new method to a php object on the fly?
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You can harness __call for this:
class Foo
{
public function __call($method, $args)
{
if (isset($this->$method)) {
$func = $this->$method;
return call_user_func_array($func, $args);
}
...
How to concatenate twice with the C preprocessor and expand a macro as in “arg ## _ ## MACRO”?
...ard C Preprocessor
$ cat xx.c
#define VARIABLE 3
#define PASTER(x,y) x ## _ ## y
#define EVALUATOR(x,y) PASTER(x,y)
#define NAME(fun) EVALUATOR(fun, VARIABLE)
extern void NAME(mine)(char *x);
$ gcc -E xx.c
# 1 "xx.c"
# 1 "<built-in>"
# 1 "<command-line>"
# 1 "xx.c"
extern void mi...
What is the syntax rule for having trailing commas in tuple definitions?
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Another reason that this exists is that it makes code generation and __repr__ functions easier to write. For example, if you have some object that is built like obj(arg1, arg2, ..., argn), then you can just write obj.__repr__ as
def __repr__(self):
l = ['obj(']
for arg in obj.args: #...
Iterate over model instance field names and values in template
...f the values of that instance in table format, with the field name (verbose_name specifically if specified on the field) in the first column and the value of that field in the second column.
...
Mongoose, Select a specific field with find
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The _id field is always present unless you explicitly exclude it. Do so using the - syntax:
exports.someValue = function(req, res, next) {
//query with mongoose
var query = dbSchemas.SomeValue.find({}).select('name -_id'...
Find the nth occurrence of substring in a string
... more Pythonic version of the straightforward iterative solution:
def find_nth(haystack, needle, n):
start = haystack.find(needle)
while start >= 0 and n > 1:
start = haystack.find(needle, start+len(needle))
n -= 1
return start
Example:
>>> find_nth("fo...