examples/syntax_hilite.py

# Copyright 2018-2022 Streamlit Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import streamlit as st
from collections import namedtuple

Language = namedtuple("Language", ["name", "example"])

languages = [
    Language(
        name="Python",
        example="""
# Python
def say_hello():
    name = 'Streamlit'
    print('Hello, %s!' % name)""",
    ),
    Language(
        name="C",
        example="""
/* C */
int main(void) {
    const char *name = "Streamlit";
    printf(\"Hello, %s!\", name);
    return 0;
}""",
    ),
    Language(
        name="JavaScript",
        example="""
/* JavaScript */
function sayHello() {
    const name = 'Streamlit';
    console.log(`Hello, ${name}!`);
}""",
    ),
    Language(
        name="Shell",
        example="""
# Bash/Shell
NAME="Streamlit"
echo "Hello, ${NAME}!"
""",
    ),
    Language(
        name="SQL",
        example="""
/* SQL */
SELECT * FROM software WHERE name = 'Streamlit';
""",
    ),
    Language(
        name="JSON",
        example="""

{
    "_comment": "This is a JSON file!",
    name: "Streamlit",
    version: 0.27
}""",
    ),
    Language(
        name="YAML",
        example="""
# YAML
software:
    name: Streamlit
    version: 0.27
""",
    ),
    Language(
        name="HTML",
        example="""
<!-- HTML -->
<head>
  <title>Hello, Streamlit!</title>
</head>
""",
    ),
    Language(
        name="CSS",
        example="""
/* CSS */
.style .token.string {
    color: #9a6e3a;
    background: hsla(0, 0%, 100%, .5);
}
""",
    ),
    Language(
        name="JavaScript",
        example="""
console.log('This is an extremely looooooooooooooooooooooooooooooooooooooooooooooooooooong string.')
    """,
    ),
]


st.header("Syntax hiliting")

st.subheader("Languages")
for lang in languages:
    st.code(lang.example, lang.name)

st.subheader("Other stuff")
with st.echo():
    print("I'm inside an st.echo() block!")

st.markdown(
    """
This is a _markdown_ block...
```python
print('...and syntax hiliting works here, too')
```
"""
)