大约有 47,000 项符合查询结果（耗时：0.0583秒） [XML]
Cost of exception handlers in Python
...ve just tried the following:
import timeit
statements=["""\
try:
b = 10/a
except ZeroDivisionError:
pass""",
"""\
if a:
b = 10/a""",
"b = 10/a"]
for a in (1,0):
for s in statements:
t = timeit.Timer(stmt=s, setup='a={}'.format(a))
print("a = {}\n{}".format(a,s))
...
If vs. Switch Speed
...Rudolph
461k118118 gold badges863863 silver badges11101110 bronze badges
6
...
What does the “assert” keyword do? [duplicate]
...nableassertions that is.)
Formally, the Java Language Specification: 14.10. The assert Statement says the following:
14.10. The assert Statement
An assertion is an assert statement containing a boolean expression. An assertion is either enabled or disabled. If the assertion is enabled, exec...
How to do a logical OR operation in shell scripting
...
1001
This should work:
#!/bin/bash
if [ "$#" -eq 0 ] || [ "$#" -gt 1 ] ; then
echo "hello"
f...
In Jinja2, how do you test if a variable is undefined?
...
answered Oct 1 '10 at 20:14
GarrettGarrett
31.4k55 gold badges5151 silver badges4747 bronze badges
...
Find the index of a dict within a list, by matching the dict's value
...
answered Dec 8 '10 at 20:03
toklandtokland
58.5k1212 gold badges124124 silver badges159159 bronze badges
...
How to exit an if clause
...
102
(This method works for ifs, multiple nested loops and other constructs that you can't break fr...
How to convert a string to integer in C?
...ons in C99. For example you could say:
uintmax_t num = strtoumax(s, NULL, 10);
if (num == UINTMAX_MAX && errno == ERANGE)
/* Could not convert. */
Anyway, stay away from atoi:
The call atoi(str) shall be equivalent to:
(int) strtol(str, (char **)NULL, 10)
except that the ha...
how to set “camera position” for 3d plots using python/matplotlib?
...nrod", alpha=0.6)
for ii in xrange(0,360,1):
ax.view_init(elev=10., azim=ii)
savefig("movie%d.png" % ii)
share
|
improve this answer
|
follow
...