0 1 00:00:04,880 --> 00:00:06,810 Hello again, in previous lecture, what we did, 1 2 00:00:06,810 --> 00:00:09,390 let me run our application first. 2 3 00:00:09,390 --> 00:00:11,960 Here we created our file. 3 4 00:00:11,960 --> 00:00:15,230 And also, open a menu item of function, right. 4 5 00:00:15,230 --> 00:00:16,820 And in this lesson, what I want to do, 5 6 00:00:16,820 --> 00:00:21,220 I want to create function for this, save menu item. 6 7 00:00:21,220 --> 00:00:23,530 What I need to do, now before I need to go to 7 8 00:00:23,530 --> 00:00:26,560 find my menu item, it's main menu 8 9 00:00:26,560 --> 00:00:28,820 and here, right, save. 9 10 00:00:28,820 --> 00:00:32,060 Here, I will say comma and I will create 10 11 00:00:32,060 --> 00:00:35,010 command property for this menu item. 11 12 00:00:35,010 --> 00:00:40,010 And I will say self.parent.saveFile. 12 13 00:00:40,240 --> 00:00:42,310 Okay, and here, what I need to do, 13 14 00:00:42,310 --> 00:00:45,410 I need to create this definition. 14 15 00:00:45,410 --> 00:00:49,220 I will go to do here main application 15 16 00:00:49,220 --> 00:00:51,480 and before, open file. 16 17 00:00:51,480 --> 00:00:56,480 Here I will say def saveFile and first argument 17 18 00:00:57,260 --> 00:01:01,590 will be self and other one will be asterisk args, right. 18 19 00:01:01,590 --> 00:01:04,290 And before creating our function, 19 20 00:01:04,290 --> 00:01:06,160 I want to show you something here. 20 21 00:01:06,160 --> 00:01:10,970 I will open original notepad application. 21 22 00:01:10,970 --> 00:01:13,270 Now, this is not bad application, right. 22 23 00:01:13,270 --> 00:01:15,480 We have here two choices, okay. 23 24 00:01:15,480 --> 00:01:17,740 The first one is, for example, if I, 24 25 00:01:17,740 --> 00:01:19,680 let's click file new f-- 25 26 00:01:19,680 --> 00:01:21,660 okay, this is a new file. 26 27 00:01:21,660 --> 00:01:25,010 That means this file doesn't have URL, okay. 27 28 00:01:25,010 --> 00:01:26,940 And we didn't save this file. 28 29 00:01:26,940 --> 00:01:29,820 For example, if I change content, 29 30 00:01:29,820 --> 00:01:31,360 content of this file and after that, 30 31 00:01:31,360 --> 00:01:34,580 if I say save, you see, what, 31 32 00:01:34,580 --> 00:01:38,130 what I need to do now here we have dialogue window, right. 32 33 00:01:38,130 --> 00:01:41,500 And we need to save our, our file 33 34 00:01:41,500 --> 00:01:44,940 because this, this file doesn't have URL, right. 34 35 00:01:44,940 --> 00:01:46,290 And I will say cancel. 35 36 00:01:46,290 --> 00:01:49,410 After that, here, I want to open a file 36 37 00:01:49,410 --> 00:01:52,630 from my computer here. 37 38 00:01:52,630 --> 00:01:54,500 Let's say cancel, sorry. 38 39 00:01:54,500 --> 00:01:55,893 And, here, 39 40 00:01:57,380 --> 00:01:58,370 delete this guy. 40 41 00:01:58,370 --> 00:02:01,310 And here, let me say, open, okay. 41 42 00:02:01,310 --> 00:02:04,660 And I will open an existing file from my computer. 42 43 00:02:04,660 --> 00:02:06,750 For example, that one, okay. 43 44 00:02:06,750 --> 00:02:09,750 And let's change this content, okay. 44 45 00:02:09,750 --> 00:02:10,583 This... 45 46 00:02:11,480 --> 00:02:12,500 Something like that, okay. 46 47 00:02:12,500 --> 00:02:15,040 And after that, I will say save. 47 48 00:02:15,040 --> 00:02:18,373 Now, you see, nothing happens and I don't see here 48 49 00:02:18,373 --> 00:02:19,820 a dialogue window. 49 50 00:02:19,820 --> 00:02:20,653 Why's it like that? 50 51 00:02:20,653 --> 00:02:25,653 Because this file is, this file has already a URL. 51 52 00:02:26,120 --> 00:02:29,650 Okay, that's why we don't need to see here dialogue window. 52 53 00:02:29,650 --> 00:02:32,440 Okay, so, what I need to do now here, 53 54 00:02:32,440 --> 00:02:34,660 I will save it again. 54 55 00:02:34,660 --> 00:02:39,370 And go back to here and I need to know 55 56 00:02:39,370 --> 00:02:44,150 My file already has a URL or doesn't have this URL, okay. 56 57 00:02:44,150 --> 00:02:46,750 To that I will say here global URL. 57 58 00:02:46,750 --> 00:02:49,070 I will use my global URL. 58 59 00:02:49,070 --> 00:02:53,153 After that, here try and except, okay. 59 60 00:02:54,550 --> 00:02:56,713 For except, for now let's say pass. 60 61 00:02:57,579 --> 00:02:59,670 Okay, for try, what I need to do, 61 62 00:02:59,670 --> 00:03:04,670 firstly, I will say if URL not equals empty. 62 63 00:03:05,880 --> 00:03:10,310 That means this file already in, 63 64 00:03:10,310 --> 00:03:11,400 on my computer, okay. 64 65 00:03:11,400 --> 00:03:13,910 This is an existing file, okay. 65 66 00:03:13,910 --> 00:03:16,140 And here, what I need to do, I need to create here 66 67 00:03:16,140 --> 00:03:19,590 a variable, content variable and I will say str 67 68 00:03:20,610 --> 00:03:25,510 self.texteditor.get, I will get all content 68 69 00:03:25,510 --> 00:03:29,450 off my text editor from first character until end. 69 70 00:03:29,450 --> 00:03:32,470 Okay, and after that here, what I need to do, 70 71 00:03:32,470 --> 00:03:37,470 I need to say with open and here I will use URL. 71 72 00:03:41,300 --> 00:03:46,100 And after that, second parameter will be write mode, okay. 72 73 00:03:46,100 --> 00:03:47,640 And also I want to use encoding here. 73 74 00:03:47,640 --> 00:03:52,640 Encoding equals UTF dash eight, okay. 74 75 00:03:54,420 --> 00:03:56,260 And after that, what I need to do here, 75 76 00:03:56,260 --> 00:03:59,710 I need to say, as file, right. 76 77 00:03:59,710 --> 00:04:04,710 And here I will say file.right my content. 77 78 00:04:05,870 --> 00:04:09,293 So, what I'm doing here, let me run our application first. 78 79 00:04:11,960 --> 00:04:14,090 Here, I need to open a file, right, 79 80 00:04:14,090 --> 00:04:18,460 and let me resize my application here. 80 81 00:04:18,460 --> 00:04:19,610 I will open a file. 81 82 00:04:19,610 --> 00:04:20,893 Let's say open. 82 83 00:04:22,190 --> 00:04:23,660 And let's open that one, okay. 83 84 00:04:23,660 --> 00:04:24,850 For example. 84 85 00:04:24,850 --> 00:04:26,890 And this is my file. 85 86 00:04:26,890 --> 00:04:28,380 Now, if I want to save it, 86 87 00:04:28,380 --> 00:04:30,503 what I am doing here, firstly, 87 88 00:04:30,503 --> 00:04:33,740 I will get this content, okay 88 89 00:04:33,740 --> 00:04:37,310 and after that, I will overwrite this file 89 90 00:04:37,310 --> 00:04:39,500 for this URL, okay. 90 91 00:04:39,500 --> 00:04:41,373 And then I say save. 91 92 00:04:42,490 --> 00:04:46,200 Now, my file was aaa.txt, right. 92 93 00:04:46,200 --> 00:04:47,360 If I say, open... 93 94 00:04:50,350 --> 00:04:52,810 You see now, hello, how are you, python. 94 95 00:04:52,810 --> 00:04:54,950 And this is my content, okay. 95 96 00:04:54,950 --> 00:04:59,790 So, this is for if our file has URL 96 97 00:04:59,790 --> 00:05:02,330 and other option was, right, 97 98 00:05:02,330 --> 00:05:05,073 it, I need to say here, else. 98 99 00:05:06,230 --> 00:05:08,550 Else means my file is a new file 99 100 00:05:08,550 --> 00:05:10,780 and doesn't have URL, okay. 100 101 00:05:10,780 --> 00:05:13,440 So, I will say here, URL equals, 101 102 00:05:13,440 --> 00:05:16,170 what I need to do, I need to use file dialogue, right. 102 103 00:05:16,170 --> 00:05:19,509 File dialogue and here I will say, 103 104 00:05:19,509 --> 00:05:22,160 ask save as file, right. 104 105 00:05:22,160 --> 00:05:24,800 And the first parameter will be my mode. 105 106 00:05:24,800 --> 00:05:28,520 Mode will be W mode, writing, okay. 106 107 00:05:28,520 --> 00:05:31,203 And after, after that, the other one 107 108 00:05:31,203 --> 00:05:35,760 will be default extension, okay. 108 109 00:05:35,760 --> 00:05:38,080 The default extension is going to be 109 110 00:05:39,770 --> 00:05:42,790 dot txt, okay? 110 111 00:05:42,790 --> 00:05:44,907 And after that, what I'm doing here, 111 112 00:05:44,907 --> 00:05:48,710 I will say comma and I will press enter here. 112 113 00:05:48,710 --> 00:05:53,710 And I will say file types, types 113 114 00:05:53,740 --> 00:05:56,700 equals, here I will use parentheses. 114 115 00:05:56,700 --> 00:05:59,640 Okay, and the first one is going 115 116 00:05:59,640 --> 00:06:01,840 to be my text file extension. 116 117 00:06:01,840 --> 00:06:06,803 Here, I will say, quote text file, 117 118 00:06:08,700 --> 00:06:11,623 for text file, I will use, of course, 118 119 00:06:12,770 --> 00:06:16,560 asterisk dot txt, this is my extension. 119 120 00:06:16,560 --> 00:06:18,153 And second one will be, 120 121 00:06:20,040 --> 00:06:22,220 here I will use another parentheses 121 122 00:06:22,220 --> 00:06:24,933 and quotes all files, okay. 122 123 00:06:26,070 --> 00:06:28,720 And here, what I will do here, again, 123 124 00:06:28,720 --> 00:06:33,720 comma and quotes, I will say, asterisk dot asterisk. 124 125 00:06:35,423 --> 00:06:36,256 Okay. 125 126 00:06:36,256 --> 00:06:39,210 What I need to do now, here after that, 126 127 00:06:39,210 --> 00:06:42,083 I will come to here and I will create another content. 127 128 00:06:43,769 --> 00:06:47,686 Content2 is going to be str self.texteditor.get 128 129 00:06:55,960 --> 00:06:59,600 from first until end, okay. 129 130 00:06:59,600 --> 00:07:03,723 And here, I need to say URL.right 130 131 00:07:05,890 --> 00:07:10,550 my content2, okay and also after that, 131 132 00:07:10,550 --> 00:07:15,360 I need to say URL.close, okay. 132 133 00:07:15,360 --> 00:07:18,230 Now, here also for except, what I need to do, 133 134 00:07:18,230 --> 00:07:23,230 if user doesn't select a file, I will say here, 134 135 00:07:23,370 --> 00:07:25,090 simply return, okay. 135 136 00:07:25,090 --> 00:07:28,280 Like before here, we also used return, remember. 136 137 00:07:28,280 --> 00:07:30,143 Now, if I run my application, 137 138 00:07:31,718 --> 00:07:34,850 we already checked for existing files, right. 138 139 00:07:34,850 --> 00:07:36,350 Now, I will create a new file. 139 140 00:07:36,350 --> 00:07:37,910 Actually, this is also a new file. 140 141 00:07:37,910 --> 00:07:39,050 It doesn't have URL. 141 142 00:07:39,050 --> 00:07:41,200 But also, let's create a new one. 142 143 00:07:41,200 --> 00:07:43,030 So, this is a new one. 143 144 00:07:43,030 --> 00:07:46,263 And, even, let's say something like, 144 145 00:07:47,560 --> 00:07:50,893 hi, how are you today? 145 146 00:07:51,980 --> 00:07:53,370 Something like that, okay. 146 147 00:07:53,370 --> 00:07:54,930 Now, I will save it. 147 148 00:07:54,930 --> 00:07:56,560 Save file. 148 149 00:07:56,560 --> 00:07:59,120 And after that save, right, 149 150 00:07:59,120 --> 00:08:01,130 you see this is our dialogue window? 150 151 00:08:01,130 --> 00:08:05,270 And now I will name it and lets say new file. 151 152 00:08:06,650 --> 00:08:08,240 Something like that, okay. 152 153 00:08:08,240 --> 00:08:11,890 And now I saved it and let's go to open it now. 153 154 00:08:11,890 --> 00:08:12,723 Open. 154 155 00:08:14,010 --> 00:08:16,700 New file, right, it was new file. 155 156 00:08:16,700 --> 00:08:20,420 As you see now, it said, hi, how are you today? 156 157 00:08:20,420 --> 00:08:23,910 This is how we can use save file dialogue for our files. 157 158 00:08:23,910 --> 00:08:25,570 for now, that's all. 158 159 00:08:25,570 --> 00:08:26,563 See you next.