docs: fix pip install instruction

.github/labeler.yml

@@ -18,6 +18,9 @@ area/core:
 area/helper:
   - jina/*.py
 
+area/helloworld:
+  - jina/helloworld/*
+
 area/network:
   - jina/peapods/**/*
   - jina/proto/**/*
@@ -74,3 +77,4 @@ component/proto:
 
 component/resource:
   - jina/resources/**/*
+

docs/chapters/faq/dev.rst

@@ -9,6 +9,6 @@ FAQ for Developers
 
     Jina only requires very few dependencies as described in :file:`setup.py`. Please keep the content empty (with a `.`) in :file:`requirements.txt`, so that ``pip`` won't be confused when installing the dependencies.
 
-    :file:`extra-requirements.txt` is the executor-specific dependency which Jina does not require but some certain executor may do. They are collected here so that one can cherry pick the dependencies via :command:`pip install jina[xyz]`.
+    :file:`extra-requirements.txt` is the executor-specific dependency which Jina does not require but some certain executor may do. They are collected here so that one can cherry pick the dependencies via :command:`pip install "jina[xyz]"`.
 
     More information about this trick can be `found in this blog post <https://hanxiao.io/2019/11/07/A-Better-Practice-for-Managing-extras-require-Dependencies-in-Python>`_ .

docs/chapters/helloworld/main.rst

@@ -85,7 +85,7 @@ View "Hello World" in Jina Dashboard
 .. highlight:: bash
 .. code-block:: bash
 
-    pip install jina[sse]
+    pip install "jina[sse]"
 
     jina hello-world --logserver
 

docs/chapters/install/via-pip.md

@@ -39,15 +39,15 @@ Jina only requires five dependencies `numpy`, `pyzmq`, `protobuf`, `grpcio` and
 Some of the Executors may require extra dependencies. The full table of the extra dependencies can be found in `extra-requirements.txt`. You can cherry-pick what you want to install, e.g.
 
 ```bash
-pip install jina[nlp+cv]
+pip install "jina[nlp+cv]"
 ``` 
 
 This will install all dependencies tagged with `nlp` or `cv`.
 
 Though not recommended, you can install Jina with full dependencies via:
 
 ```bash
-pip install jina[all]
+pip install "jina[all]"
 ``` 
 
 ## Install Jina on Raspberry Pi and other Linux Systems

jina/flow/__init__.py

@@ -442,7 +442,7 @@ def _start_log_server(self):
         except ModuleNotFoundError:
             self.logger.error(
                 f'sse logserver can not start because of "flask" and "flask_cors" are missing, '
-                f'use "pip install jina[http]" to install the dependencies')
+                f'use pip install "jina[http]" (with double quotes) to install the dependencies')
         except:
             self.logger.error('logserver fails to start')
 

jina/logging/sse.py

@@ -39,7 +39,7 @@ def start_sse_logger(server_config_path: str, flow_yaml: str = None):
     except ImportError:
         raise ImportError('Flask or its dependencies are not fully installed, '
                           'they are required for serving HTTP requests.'
-                          'Please use "pip install jina[flask]" to install it.')
+                          'Please use pip install "jina[flask]" to install it.')
 
     try:
         with open(server_config_path) as fp: