Python - math.atan() function

# Python code to implement
# the atan()function

# importing "math"
# for mathematical operations  
import math   
    
a = math.pi / 6
     
# returning the value of arctangent  of pi / 6  
print ("The value of tangent of pi / 6 is : ", end ="")  
print (math.atan(a))  

# Python code to implement
# the atan()function
import math 
import numpy as np 
import matplotlib.pyplot as plt  
   
in_array = np.linspace(0, np.pi, 10)  
   
out_array = [] 
   
for i in range(len(in_array)): 
    out_array.append(math.atan(in_array[i])) 
    i += 1
      
print("Input_Array : \n", in_array)  
print("\nOutput_Array : \n", out_array)   
 
plt.plot(in_array, out_array, "go:")  
plt.title("math.atan()")  
plt.xlabel("X")  
plt.ylabel("Y")  
plt.show()