Question

Pandas有一个很快的查询方法，但是我不能用它来处理句点索引吗？它适用于datetime索引但不适用于Period index！

Answer 1

演示：

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.design.widget.AppBarLayout
        android:id="@+id/main.appbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">

        <android.support.design.widget.CollapsingToolbarLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content">
            <android.support.v7.widget.Toolbar
                android:id="@+id/toolbar"
                android:layout_width="match_parent"
                android:title="@string/app_name"
                android:layout_height="?attr/actionBarSize"
                android:background="?attr/colorPrimary"
                android:elevation="4dp"
                app:popupTheme="@style/ThemeOverlay.AppCompat.Light">

            </android.support.v7.widget.Toolbar>
        </android.support.design.widget.CollapsingToolbarLayout>

    </android.support.design.widget.AppBarLayout>

    <de.hdodenhof.circleimageview.CircleImageView
        android:id="@+id/profile_pic"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/avatar_boy_2"
        app:layout_anchor="@id/main.appbar"
        app:layout_anchorGravity="bottom|center"/>

    <android.support.v4.widget.NestedScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_anchor="@id/profile_pic"
        app:layout_anchorGravity="bottom"
        >

        <android.support.constraint.ConstraintLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent">

            <TextView
                android:id="@+id/user_name"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_marginLeft="8dp"
                android:layout_marginRight="8dp"
                android:lineSpacingExtra="8dp"
                android:padding="@dimen/activity_horizontal_margin"
                android:text="@string/account_person_name_label"
                android:textAlignment="center"
                android:textSize="40sp"
                app:layout_constraintHorizontal_bias="0.0"
                app:layout_constraintLeft_toLeftOf="parent"
                app:layout_constraintRight_toRightOf="parent"
                tools:layout_editor_absoluteY="168dp" />

        </android.support.constraint.ConstraintLayout>

    </android.support.v4.widget.NestedScrollView>


</android.support.design.widget.CoordinatorLayout>

如何使用Pandas.DataFrame查询方法获取日期时间或句点类型的索引？

1 个答案: