# col<angles
_chart = (
    alt.Chart(df)
    .mark_bar()
    .encode(
        y=alt.Y("col<angles", type="nominal"),
        x=alt.X("count()", type="quantitative"),
    )
    .properties(width="container")
)
_chart

# col[0]brackets
_chart = (
    alt.Chart(df)
    .mark_bar()
    .encode(
        y=alt.Y("col\[0\]brackets", type="nominal"),
        x=alt.X("count()", type="quantitative"),
    )
    .properties(width="container")
)
_chart

# col:colon
_chart = (
    alt.Chart(df)
    .mark_bar()
    .encode(
        y=alt.Y("col\:colon", type="nominal"),
        x=alt.X("count()", type="quantitative"),
    )
    .properties(width="container")
)
_chart

# col.period
_chart = (
    alt.Chart(df)
    .mark_bar()
    .encode(
        y=alt.Y("col\.period", type="nominal"),
        x=alt.X("count()", type="quantitative"),
    )
    .properties(width="container")
)
_chart

# col\backslash
_chart = (
    alt.Chart(df)
    .mark_bar()
    .encode(
        y=alt.Y("col\backslash", type="nominal"),
        x=alt.X("count()", type="quantitative"),
    )
    .properties(width="container")
)
_chart