feat: streamlist basics

Author: dbuchaca

python_libraries/streamlit/03_widgets.py

@@ -96,6 +96,7 @@
 """
 st.code(code_ex_4)
 
+### Example 4 BEGIN ###
 uploaded_file = None
 uploaded_file = st.file_uploader("Upload Image (.png or .jpg only)", type=['png','jpg'], key='uploader_flag')
 
@@ -104,8 +105,26 @@
     image = Image.open(io.BytesIO(bytes_uploaded_file))
     image = image.resize((256,256))
     st.image(image)
+### Example 4 END ###
 
 
 
+st.subheader("Text uploader: `st.text_input`")
+
+'The following code will allow you to create a box for writting text'
+
+code_ex_5 = """
+uploaded_urls = st.text_input("Paste here urls")
+"""
+st.code(code_ex_5)
+
+### Example 5 BEGIN ###
+uploaded_urls = st.text_input("Paste here urls")
+### Example 5 END ###
+parsed_urls = uploaded_urls.split('\n')
+st.write('Number of uploaded urls are:', len(parsed_urls))
+for url in parsed_urls:
+    st.write('uploaded_urls are:', url)
+
 
 

python_libraries/streamlit/05_incremental_dataframe.py

@@ -0,0 +1,47 @@
+# This exapmles shows how to increment a dataframe every time a button is pressed
+
+import streamlit as st
+import io
+import pandas as pd
+
+df = pd.DataFrame()
+st.title("Add Movies and related words to a table")
+
+if 'df' not in st.session_state:
+    st.session_state.df = pd.DataFrame()
+    st.session_state.df_csv = None 
+
+related_words = None
+movie = None
+
+def update_df(st, movie, related_words):
+    df_current = pd.DataFrame({'movie': movie, 'asin_examples': [related_words] })
+    st.session_state.df = pd.concat((st.session_state.df, df_current))
+    st.write(f'Added {len(related_words)} related terms')
+    st.session_state.df_csv = st.session_state.df.to_csv(index=True).encode("utf-8")
+
+def clear_df():
+    st.session_state.df = pd.DataFrame()
+    st.session_state.df_csv = None
+
+new_movie_container = st.container()
+new_movie = new_movie_container.text_input('Write here Movie to add')
+
+related_words_container = st.container()
+related_words = related_words_container.text_input('related words')
+
+if related_words:
+    related_words = related_words.split(',')
+
+st.write('Number of movies added so far:', len(st.session_state.df))
+added_data = st.button('Add related words', 
+                       on_click=update_df,  
+                       kwargs=dict(st=st, movie=new_movie, related_words=related_words) )
+st.button('Clear data', on_click=clear_df())
+
+if added_data:
+    download_button = st.download_button("Download button", 
+                            data=st.session_state.df.to_csv(index=True).encode("utf-8"), 
+                            key='download_button_flag',
+                            file_name='df.csv')
+

python_libraries/streamlit/05_incremental_df.py

@@ -0,0 +1,38 @@
+
+# This exapmles shows how to increment a dataframe every time a button is pressed
+import streamlit as st
+import SessionState
+import pandas as pd
+
+st.header("Grow table of movies and related words clicking a button")
+
+movies = []
+words = []
+
+ss = SessionState.get(movies=movies, words=words)
+
+container_movies = st.container()
+container_words = st.container()
+
+new_movie = container_movies.text_input('Write here movie to add')
+new_words = container_movies.text_input('Write here related words to movie (separated by a comma)')
+add_button = container_words.button('add')
+
+if add_button:
+    if new_movie in ss.movies:
+        st.write(f'{new_movie} already in the table')
+    else:
+        ss.movies.append(new_movie)
+        ss.words.append(new_words.split(','))
+
+#st.write('movies:')
+#st.write(ss.movies)
+#st.write('words:')
+#st.write(ss.words)
+
+st.header("Table")
+
+movies = ss.movies
+words = ss.words
+df = pd.DataFrame({'movie': movies, 'words': words})
+st.dataframe(df)

python_libraries/streamlit/05_incremental_list.py

@@ -0,0 +1,20 @@
+# This exapmles shows how to increment a dataframe every time a button is pressed
+
+import streamlit as st
+import SessionState
+
+st.title("Add words to a list when clicking a button")
+
+words = []
+
+ss = SessionState.get(words=words)
+
+container1 = st.container()
+new_word = container1.text_input('Write here word to add')
+container2 = st.container()
+add_button = container2.button('add')
+
+if add_button:
+    ss.words.append(new_word)
+
+st.write(ss.words)

python_libraries/streamlit/SessionState.py

@@ -0,0 +1,65 @@
+from streamlit.report_thread import get_report_ctx
+import streamlit as st
+
+
+class SessionState(object):
+    def __init__(self, **kwargs):
+        """A new SessionState object.
+
+        Parameters
+        ----------
+        **kwargs : any
+            Default values for the session state.
+
+        Example
+        -------
+        >>> session_state = SessionState(user_name='', 
+favorite_color='black')
+        >>> session_state.user_name = 'Mary'
+        ''
+        >>> session_state.favorite_color
+        'black'
+
+        """
+        for key, val in kwargs.items():
+            setattr(self, key, val)
+
+
+@st.cache(allow_output_mutation=True)
+def get_session(id, **kwargs):
+    return SessionState(**kwargs)
+
+
+def get(**kwargs):
+    """Gets a SessionState object for the current session.
+
+    Creates a new object if necessary.
+
+    Parameters
+    ----------
+    **kwargs : any
+        Default values you want to add to the session state, if we're 
+creating a
+        new one.
+
+    Example
+    -------
+    >>> session_state = get(user_name='', favorite_color='black')
+    >>> session_state.user_name
+    ''
+    >>> session_state.user_name = 'Mary'
+    >>> session_state.favorite_color
+    'black'
+
+    Since you set user_name above, next time your script runs this will be 
+the
+    result:
+    >>> session_state = get(user_name='', favorite_color='black')
+    >>> session_state.user_name
+    'Mary'
+
+    """
+    ctx = get_report_ctx()
+    id = ctx.session_id
+    return get_session(id, **kwargs)
+