在R中找不到tensorflow

install.packages("reticulate")  # 安装reticulate包，用于在R中调用Python库
library(reticulate)  # 加载reticulate包

# 创建一个Python环境，指定tensorflow和keras的安装路径
use_python("/path/to/python")  # 将"/path/to/python"替换为你的Python安装路径

# 安装和加载tensorflow和keras包
install.packages("tensorflow")
install.packages("keras")
library(tensorflow)
library(keras)

sess <- tf$Session()

x <- tf$constant(5)

result <- sess$run(x)

model <- keras_model_sequential()
model$add(layer_dense(units = 64, activation = 'relu', input_shape = c(784)))
model$add(layer_dense(units = 10, activation = 'softmax'))