Update README.md

README.md

@@ -3,7 +3,7 @@
 ```bash
 git clone http://tesla.parallel.ru/vonopr/inmplot.git
 cd inmplot
-python -m pip install -e .
+python3 -m pip install -e .
 
 ```
 
@@ -13,12 +13,12 @@ python -m pip install -e .
 ### Create an image from ctl file with command line
 
 ```bash
-python -m plot_ctl --file=mmsst.ctl --var=sst --tnum=0 --output=sst.png
+python3 -m plot_ctl --file=mmsst.ctl --var=sst --tnum=0 --output=sst.png
 ```
 
 ### Convert ctl to netcdf
 ```bash
-python -m ctler mmsst.ctl mmsst.nc
+python3 -m ctler mmsst.ctl mmsst.nc
 ```
 
 # Known issues