1、>>> import theano

WARNING (theano.configdefaults): g++not available, if using conda: conda install m2w64-toolchain WARNING (theano.configdefaults): g++not detected ! Theano will be unable to execute optimized C- imp

解決方法：

鍵入命令解決：conda install m2w64-toolchain

2、import theano 失敗解決方法：

問題的解決方案就是安裝libpython 檢視conda list 如果沒有libpython 然後輸入一句命令：conda install libpython

然後,import theano,成功！

"""
python3.6
"""
import numpy as np
import theano.tensor as T
from theano import function


x = T.dscalar('x')
y = T.dscalar('y')
z = x+y     # define the actual function in here
f = function([x, y], z)  # the inputs are in [], and the output in the "z"
# def f(x,y):
#     return x+y
 

print(f(2,3))  # 輸出2與3的和

# to pretty-print the function
from theano import pp 
print(pp(z))

# how about matrix
x = T.dmatrix('x')
y = T.dmatrix('y')
z = x + y # 矩陣積 z = T.dot(x,y)
f = function([x, y], z)
print(f(np.arange(12).reshape((3,4)), 10*np.ones((3,4))))