fixes imports

Signed-off-by: Wenqi Li <[email protected]>

Author: wyli

model_zoo/TCIA_PROSTATEx_Prostate_MRI_Anatomy_Model.ipynb

@@ -95,7 +95,7 @@
     "import os\n",
     "\n",
     "# Upgrade pip, just in case.\n",
-    "!{sys.executable} -m pip install --upgrade -q pip"
+    "!python -m pip install --upgrade -q pip"
    ]
   },
   {
@@ -116,13 +116,13 @@
     "!python -c \"import monai\" || pip install -q \"monai[nibabel,itk,tqdm,pandas,skimage]\"\n",
     "\n",
     "# These are the libraries used to read DICOM Seg objects.\n",
-    "!{sys.executable} -m pip install -q pydicom pydicom-seg\n",
+    "!python -m pip install -q pydicom pydicom-seg\n",
     "\n",
     "# Install tcia_utils to download the datasets.\n",
-    "!{sys.executable} -m pip install --upgrade -q tcia_utils\n",
+    "!python -m pip install --upgrade -q tcia_utils\n",
     "\n",
     "# This is the installation required for itkWidgets.\n",
-    "!{sys.executable} -m pip install --upgrade --pre -q \"itkwidgets[all]==1.0a20\" imjoy_elfinder"
+    "!python -m pip install --upgrade --pre -q \"itkwidgets[all]==1.0a20\" imjoy_elfinder"
    ]
   },
   {