Update README.md

README.md

@@ -101,17 +101,17 @@ git clone https://github.com/PaddlePaddle/Serving
 install python dependencies
 ```
 cd Serving
-pip install -r python/requirements.txt
+pip3 install -r python/requirements.txt
 ```
 
 ```shell
-pip install paddle-serving-client==0.6.0
-pip install paddle-serving-server==0.6.0 # CPU
-pip install paddle-serving-app==0.6.0
-pip install paddle-serving-server-gpu==0.6.0.post102 #GPU with CUDA10.2 + TensorRT7
+pip3 install paddle-serving-client==0.6.0
+pip3 install paddle-serving-server==0.6.0 # CPU
+pip3 install paddle-serving-app==0.6.0
+pip3 install paddle-serving-server-gpu==0.6.0.post102 #GPU with CUDA10.2 + TensorRT7
 # DO NOT RUN ALL COMMANDS! check your GPU env and select the right one
-pip install paddle-serving-server-gpu==0.6.0.post101 # GPU with CUDA10.1 + TensorRT6
-pip install paddle-serving-server-gpu==0.6.0.post11 # GPU with CUDA10.1 + TensorRT7
+pip3 install paddle-serving-server-gpu==0.6.0.post101 # GPU with CUDA10.1 + TensorRT6
+pip3 install paddle-serving-server-gpu==0.6.0.post11 # GPU with CUDA10.1 + TensorRT7
 ```
 
 You may need to use a domestic mirror source (in China, you can use the Tsinghua mirror source, add `-i https://pypi.tuna.tsinghua.edu.cn/simple` to pip command) to speed up the download.
@@ -129,10 +129,10 @@ Recommended to install paddle >= 2.1.0
 
 ```
 # CPU users, please run
-pip install paddlepaddle==2.1.0
+pip3 install paddlepaddle==2.1.0
 
 # GPU Cuda10.2 please run
-pip install paddlepaddle-gpu==2.1.0 
+pip3 install paddlepaddle-gpu==2.1.0 
 ```
 
 **Note**: If your Cuda version is not 10.2, please do not execute the above commands directly, you need to refer to [Paddle official documentation-multi-version whl package list
@@ -141,7 +141,7 @@ pip install paddlepaddle-gpu==2.1.0
 Select the url link of the corresponding GPU environment and install it. For example, for Python3.6 users of Cuda 10.1, please select `cp36-cp36m` and
 The url corresponding to `cuda10.1-cudnn7-mkl-gcc8.2-avx-trt6.0.1.5`, copy it and run
 ```
-pip install https://paddle-wheel.bj.bcebos.com/with-trt/2.1.0-gpu-cuda10.1-cudnn7-mkl-gcc8.2/paddlepaddle_gpu-2.1.0.post101-cp36-cp36m-linux_x86_64.whl
+pip3 install https://paddle-wheel.bj.bcebos.com/with-trt/2.1.0-gpu-cuda10.1-cudnn7-mkl-gcc8.2/paddlepaddle_gpu-2.1.0.post101-cp36-cp36m-linux_x86_64.whl
 ```
 
 the default `paddlepaddle-gpu==2.1.0` is Cuda 10.2 with no TensorRT. If you want to install PaddlePaddle with TensorRT. please also check the documentation-multi-version whl package list and find key word `cuda10.2-cudnn8.0-trt7.1.3`. More info please check [Paddle Serving uses TensorRT](./doc/TENSOR_RT.md)