Python| time.clock() 方法

Python中的时间模块提供了各种与时间相关的功能。

Python中time 模块的time.clock()方法用于获取当前处理器时间，以浮点数表示，以秒为单位。
因为，time 模块中定义的大部分函数都调用了相应的 C 库函数。 time.clock()方法也调用同名的 C 库函数来获取结果。返回浮点值的精度取决于调用的 C 库函数。

注意：此方法自Python 3.3 版起已弃用，将在Python 3.8 版中删除。此方法的行为取决于平台。

Syntax: time.clock()

Parameter: No parameter is required.

Return type: This method returns a float value which represents the current processor time in seconds.

代码 #1：使用time.clock()方法获取当前处理器时间

# Python program to explain time.clock() method
  
# importing time module
import time
  
# Get the current processor
# time in seconds
pro_time = time.clock()
  
# print the current 
# processor time
print("Current processor time (in seconds):", pro_time)

输出：

Current processor time (in seconds): 0.042379

代码 #2：使用time.clock()方法获取当前处理器时间

# Python program to explain time.clock() method 
  
# importing time module 
import time 
  
  
# Function to calculate factorial 
# of the given number 
def factorial(n): 
    f = 1
    for i in range(n, 1, -1): 
        f = f * i 
      
    return f 
  
  
# Get the current processor time
# in seconds at the 
# beginning of the calculation 
# using time.clock() method 
start = time.clock() 
  
# print the processor time in seconds 
print("At the beginning of the calculation") 
print("Processor time (in seconds):", start, "\n") 
  
  
# Calculate factorial of all 
# numbers form 0 to 9 
i = 0
fact = [0] * 10; 
  
while i < 10: 
    fact[i] = factorial(i) 
    i = i + 1
  
# Print the calculated factorial 
for i in range(0, len(fact)): 
    print("Factorial of % d:" % i, fact[i]) 
  
# Get the processor time
# in seconds at the end 
# of the calculation 
# using time.clock() method 
end = time.clock() 
  
print("\nAt the end of the calculation") 
print("Processor time (in seconds):", end) 
print("Time elapsed during the calculation:", end - start)     

输出：

At the beginning of the calculation
Processor time (in seconds): 0.03451 

Factorial of  0: 1
Factorial of  1: 1
Factorial of  2: 2
Factorial of  3: 6
Factorial of  4: 24
Factorial of  5: 120
Factorial of  6: 720
Factorial of  7: 5040
Factorial of  8: 40320
Factorial of  9: 362880

At the end of the calculation
Processor time (in seconds): 0.034715
Time elapsed during the calculation: 0.0002050000000000038

参考： https://docs。 Python.org/3/library/time.html#time.clock