大约有 47,000 项符合查询结果（耗时：0.0278秒） [XML]
How do I mock an open used in a with statement (using the Mock framework in Python)?
...). If you use a MagicMock (as above) then enter and exit are preconfigured for you.
– fuzzyman
Jun 6 '11 at 19:15
5
...
Open file in a relative location in Python
...pe of thing you need to be careful what your actual working directory is. For example, you may not run the script from the directory the file is in. In this case, you can't just use a relative path by itself.
If you are sure the file you want is in a subdirectory beneath where the script is actua...
In Python, if I return inside a “with” block, will the file still close?
...lso mentioned in one of the examples of PEP-343 which is the specification for the with statement:
with locked(myLock):
# Code here executes with myLock held. The lock is
# guaranteed to be released when the block is left (even
# if via return or by an uncaught exception).
Something ...
What is context in _.each(list, iterator, [context])?
...
context is where this refers to in your iterator function. For example:
var person = {};
person.friends = {
name1: true,
name2: false,
name3: true,
name4: true
};
_.each(['name4', 'name2'], function(name){
// this refers to the friends property of the person object
aler...
Command-line Unix ASCII-based charting / plotting tool
...mand-line UNIX charting / graphing / plotting tool out there? I'm looking for something that will plot xy points on an ASCII graph.
...
Elastic Search: how to see the indexed data
...y, you can just use curl from the command line, eg:
Check the mapping for an index:
curl -XGET 'http://127.0.0.1:9200/my_index/_mapping?pretty=1'
Get some sample docs:
curl -XGET 'http://127.0.0.1:9200/my_index/_search?pretty=1'
See the actual terms stored in a particular field (ie how ...
Macro vs Function in C
...os are error-prone because they rely on textual substitution and do not perform type-checking. For example, this macro:
#define square(a) a * a
works fine when used with an integer:
square(5) --> 5 * 5 --> 25
but does very strange things when used with expressions:
square(1 + 2) --> ...
What is the purpose of willSet and didSet in Swift?
...metimes, you need a property that has automatic storage and some behavior, for instance to notify other objects that the property just changed. When all you have is get/set, you need another field to hold the value. With willSet and didSet, you can take action when the value is modified without need...
difference between variables inside and outside of __init__()
...
That's not what python does for me. Lists/dicts/etc get shared between all instances if you don't create them in __init__().
– too much php
Oct 8 '09 at 11:43
...
Why doesn't Python have a sign function?
...more verbose) can be used to delegate to the end user the desired behavior for edge cases - which sometimes might require the call to cmp(x,0).
I don't know why it's not a built-in, but I have some thoughts.
copysign(x,y):
Return x with the sign of y.
Most importantly, copysign is a superset o...