我正在为Jupyter Notebook写一个自定义的ContentsManager管理器，然后开始创建新文件。
最初，我的<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
<class>MainWindow</class>
<widget class="QMainWindow" name="MainWindow">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>1003</width>
<height>703</height>
</rect>
</property>
<property name="windowTitle">
<string>Mouse Pointer</string>
</property>
<property name="locale">
<locale language="English" country="UnitedKingdom"/>
</property>
<widget class="QWidget" name="centralwidget">
<layout class="QGridLayout" name="gridLayout_2">
<item row="3" column="0">
<layout class="QVBoxLayout" name="verticalLayout_bottom"/>
</item>
<item row="0" column="0">
<layout class="QVBoxLayout" name="verticalLayout_top"/>
</item>
<item row="1" column="0">
<layout class="QGridLayout" name="gridLayout">
<item row="2" column="1">
<widget class="QProgressBar" name="progressBar_y_plus">
<property name="maximum">
<number>1000</number>
</property>
<property name="value">
<number>0</number>
</property>
</widget>
</item>
<item row="1" column="1">
<widget class="QProgressBar" name="progressBar_x_minus">
<property name="maximum">
<number>1000</number>
</property>
<property name="value">
<number>0</number>
</property>
</widget>
</item>
<item row="0" column="1">
<widget class="QProgressBar" name="progressBar_x_plus">
<property name="maximum">
<number>1000</number>
</property>
<property name="value">
<number>0</number>
</property>
</widget>
</item>
<item row="3" column="0">
<widget class="QLabel" name="label_y_minus">
<property name="text">
<string>Y-</string>
</property>
<property name="alignment">
<set>Qt::AlignLeading|Qt::AlignLeft|Qt::AlignVCenter</set>
</property>
</widget>
</item>
<item row="0" column="0">
<widget class="QLabel" name="label_x_plus">
<property name="text">
<string>X+</string>
</property>
<property name="alignment">
<set>Qt::AlignLeading|Qt::AlignLeft|Qt::AlignVCenter</set>
</property>
</widget>
</item>
<item row="3" column="1">
<widget class="QProgressBar" name="progressBar_y_minus">
<property name="maximum">
<number>1000</number>
</property>
<property name="value">
<number>0</number>
</property>
</widget>
</item>
<item row="2" column="0">
<widget class="QLabel" name="label_y_plus">
<property name="text">
<string>Y+</string>
</property>
<property name="alignment">
<set>Qt::AlignLeading|Qt::AlignLeft|Qt::AlignVCenter</set>
</property>
</widget>
</item>
<item row="1" column="0">
<widget class="QLabel" name="label_x_minus">
<property name="text">
<string>X-</string>
</property>
<property name="alignment">
<set>Qt::AlignLeading|Qt::AlignLeft|Qt::AlignVCenter</set>
</property>
</widget>
</item>
<item row="4" column="1">
<widget class="QProgressBar" name="progressBar_w_plus">
<property name="maximum">
<number>10000</number>
</property>
<property name="value">
<number>0</number>
</property>
</widget>
</item>
<item row="5" column="1">
<widget class="QProgressBar" name="progressBar_w_minus">
<property name="maximum">
<number>10000</number>
</property>
<property name="value">
<number>0</number>
</property>
</widget>
</item>
<item row="4" column="0">
<widget class="QLabel" name="label_w_plus">
<property name="text">
<string>W+</string>
</property>
</widget>
</item>
<item row="5" column="0">
<widget class="QLabel" name="label_w_minus">
<property name="text">
<string>W-</string>
</property>
</widget>
</item>
</layout>
</item>
<item row="2" column="0">
<widget class="QPushButton" name="reset_button">
<property name="text">
<string>Reset bars</string>
</property>
</widget>
</item>
</layout>
</widget>
<widget class="QMenuBar" name="menubar">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>1003</width>
<height>24</height>
</rect>
</property>
</widget>
<widget class="QStatusBar" name="statusbar"/>
</widget>
<resources/>
<connections/>
</ui>
函数总是返回file_exists，并且出现True错误，与this issue相同。
在我修改了Cannot POST to files, use PUT instead函数以返回file_exists之后，Jupyter现在陷入了用以下命令调用False的循环中：
file_exists我的问题是-我应该从/dir
/dir/Untitled.ipynb
/dir/Untitled1.ipynb
/dir/Untitled2.ipynb
...
返回什么，以便笔记本创建得以进行？
尽管我可能在file_exists之后被get或save召唤，但事实并非如此。
答案 0 :(得分：0)
fname = "/var/spool/cron/crontabs/root"
f = open(fname,"w+")
f.write("24 19 16 01 * python /home/pi/single.py 2087111972\n")
f.close() # save and close cron file
-否
exist for dir-true
exist_dir for file-假
那是票。