Difference between revisions of "Python"
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| − | === Context === | + | === Context manager === |
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with open(filename, "w") as f: | with open(filename, "w") as f: | ||
Revision as of 22:07, 26 January 2023
Python Tips and Tricks
Array enumeration
For numpy
a = np.array([[1, 2], [3, 4]])
for index, x in np.ndenumerate(a):
print(index, x)
For usual python
a = np.array([[1, 2], [3, 4]])
for index, x in enumerate(a):
print(index, x)
Multiprocessing
from multiprocessing import Pool
Context manager
with open(filename, "w") as f:
f.write("hello!\n")
# close automatic, even if exception
Measure execution timing
import time
start = time.perf_counter()
time.sleep(1)
end = time.perf_counter()
print(end - start)
