1. Problem description
Because you cannot run scripts on your computer
2. Solutions
(1) Run command window as Administrator
(2) Input command: set executionpolicy remotesignated
3. Restart the command window to solve the problem
4. Just create it again
【 https://blog.csdn.net/u013513178/article/details/114823445 】
With grant option is added in normal authorization
confirm that the authorization is normal, if the view editing is executed or an error is reported:
1. Delete the view
2. Recreate it
Unexpected token u in JSON at position 0
The error report is shown in the figure
The reason is that JSON. Parse resolves undefined
solve
Find the place of JSON. Parse and add a judgment
The following error occurred when executing gitbook init:
Find the prompt path, open the polyfills.js file, and find this function
This function is called on lines 65-67
fs.stat = statFix(fs.stat)
fs.fstat = statFix(fs.fstat)
fs.lstat = statFix(fs.lstat)
Comment out the three lines of code to solve the problem
Because of the NPM version problem, you can refer to the following two methods to solve. However, we must pay attention to which polyfills.js has a problem, which is explained in detail in the error prompt.
Recommended reading:
1 https://blog.csdn.net/yq_ forever/article/details/112121742
https://www.cnblogs.com/cyxroot/p/13754475.html
Example: insert lb.html into index.html, and lb.html has a lb.css.
Problem: at this time, index.html may report an error: refuse to apply styles from lb.css. But it’s all normal. No problem.
Attempt failed: Online modifications…/modifications, etc. are invalid here. If we start with index.html and introduce the address of lb.css into lb.html, index.html will not report an error, but lb.html will report an error and so on.
Current method: put lb.css and index.css in the same CSS folder and reference them normally. Index.html and lb.html will not report errors.
To solve Fitz module error
when using Python to process PDF documents, you need to use Fitz module. Because Python If Fitz is compatible with 3.8, the following error message will appear:
[omit part of the error message]
Runtimeerror: Directory ‘ static/’ does not Exist
the solution is to uninstall Fitz module and install pymupdf module. The following commands are executed:
pip uninstall fitz
pip install pymupdf
The error log information is as follows:
1 Unable to handle kernel NULL pointer dereference at virtual address 00000014 2 pgd = c0004000 3 [00000014] *pgd=00000000 4 Internal error: Oops: 5 [#1] PREEMPT SMP ARM 5 Modules linked in: 6 CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.10.45 #125 7 task: dc078000 ti: dc05a000 task.ti: dc05a000 8 PC is at at24c02_probe+0x78/0xa0 9 LR is at wake_up_klogd+0x84/0xac 10 pc : [<c03e27c0>] lr : [<c002d9b0>] psr: 40000113 11 sp : dc05bdb8 ip : dc05bcc0 fp : dc05bdd4 12 r10: c0a20a80 r9 : 0000009e r8 : c03e2748 13 r7 : 00000000 r6 : c08ccee4 r5 : c08ccf00 r4 : c075dbbc 14 r3 : 00000000 r2 : 00000001 r1 : 20000193 r0 : 00000020 15 Flags: nZcv IRQs on FIQs on Mode SVC_32 ISA ARM Segment kernel 16 Control: 10c5387d Table: 1000404a DAC: 00000015 17 Process swapper/0 (pid: 1, stack limit = 0xdc05a238)
1) According to the log information, the value of PC is PC is at at24c02_ probe+0x78/0xa0;
at24c02_ Probe: the function indicating the error;
0x78: indicates the offset position of the Error statement in the error function;
0xa0: AT24C02_ The size of probe function
2) Use arm none Linux gnueabi GCC nm command to find the function AT24C02_ The linear address of probe in the kernel (you can also find it in the system. Map file)
arm-none-linux-gnueabi-gcc-nm vmlinux | grep at24c02_ probe
(vmlinux is an uncompressed image file, which is in the compilation folder of the kernel.)
The results are as follows
1 c03e2748 t at24c02_probe
Description AT24C02_ The initial linear address of probe function in kernel is 0xc03e2748;
3) According to the deviation value of 0x78, using the arm none Linux gnueabi objdump command, the disassembly of address c03e2748-c03e27ff is displayed (estimated approximate range)
arm-none-linux-gnueabi-objdump -S vmlinux –start-address=0xc03e2748 –stop-address=0xc03e27ff >/tmp/file
Deviation value + starting address of function = 0x78 + 0xc03e2748 = 0xc03e27c0 (it can also be obtained from PC value of log)
The errors found in the file file are as follows:
1 c03e27b8: e59f0020 ldr r0, [pc, #32] ; c03e27e0 <at24c02_probe+0x98>
2 56 c03e27bc: eb0c86de bl c070433c <printk>
3 57 printk("The i2c device id data is %d\n", id->driver_data);
4 58 c03e27c0: e5971014 ldr r1, [r7, #20]
5 59 c03e27c4: e59f0018 ldr r0, [pc, #24] ; c03e27e4 <at24c02_probe+0x9c>
6 60 c03e27c8: eb0c86db bl c070433c <printk>
We can see that the wrong statement is: printk (“the I2C device ID data is% D/N”, ID – & gt; driver_ data);
Another method:
You can directly obtain the following information through the addr2line command:
Execute the following command under the compiled source code folder to show which line of code of that function has problems,
arm-none-linux-gnueabi-addr2line -e vmlinux c03e27c0
/opt/Sourcery_CodeBench_for_ARM_Embedded/bin/arm-none-linux-gnueabi-addr2line -e vmlinux c03e27c0
Note: please make sure that cross_ Compile is compiled with the same prefix as you, such as arm none Linux gnueabi – above. You must compile with this prefix, otherwise the calculated line number may deviate greatly.
1067 – invalid default value for ‘sex’
the above error occurred when using SQL statement to create a table in Navicat,
cause: the character set code of the default table is Latin1, so it’s OK to insert numbers, Insert Chinese characters will report an error
solution: alter database database name/table name character set utf8
1366 – incorrect string value: ‘Xe6/x8a/X80/Xe6/x9c/XAF…’ for column ‘depname’ at row 1
reason: the above consistency
problem is that the character set code of the database has been changed before, why the same problem will appear
check the database and I want to The character set code of the inserted table is UTF-8, but the table is not
alter table dep character set utf8
Still report the same error
check the field code
the character code of the field is Latin_ 1
helpless 😔
change the fields
ALTER TABLE dep CHANGE depname depname
VARCHAR(100) CHARACTER SET utf8 COLLATE utf8_general_ci;
Finally, it has become
but it’s very troublesome to change it all the time. It’s better to change the configuration file of MySQL once and for all
1. Project directory structure
2. Related dependencies (using built-in Tomcat needs to add JSP dependencies, and built-in Tomcat itself does not support JSP)
3. Control layer
4. Browser access
Cause of error:
Solution:
Visit the browser again
It’s settled
Direct NPM run build will report an error as follows:
ERROR in static/js/0.94510c9d26edb4b687ab.js from UglifyJs
Unexpected token: punc (() [./~/time-formater/lib/timeformater.js:21,0][static/js/0.94510c9d26edb4b687ab.js:41797,10]
The main problem is that when uglifyjs compresses the code, it can’t compress the code of ES6, so it should be converted to Es5 with bable first
The time formater library is ES6 and has not been converted.
Solution:
npm install –save–dev [email protected]
Under webpack. Base. Conf, the
Include: [resolve (‘src ‘), resolve (‘test’)] is modified to
include: [resolve(‘src’), resolve(‘test’),resolve(‘node_ modules/time-formater’)]
The wrong path of js.css referenced by index.html is found in config/index.js
Set to assetspublicpath: ‘. /’,
When processing raw data, the following error occurs:
id,name,date
0,a,2020/01/01
0,b,2020/01/01
0,c,2020/01/01
0,d,2020/01/01
0,e,2020/01/01
0,f,9999/01/01
It was treated with panda :
data = pandas.read_csv(file, sep=";", encoding="ISO-8859-1", parse_dates=["date"], date_parser=lambda x: pandas.to_datetime(x, format="%d.%m.%Y"))
But the running time is wrong, which means out of bonds timestamp .
Our current approach is to skip the exception line,
The following line needs to be added
date_parser=lambda x: pd.to_datetime(x, errors="coerce")
There are three kinds of assignments for the errors parameter. The default value is’ raise ‘. An error will be reported if the parsing does not conform to the specification.
You can assign the errors parameter to “coerce” and set the time format of the error to NAT during parsing. If you don’t want to deal with the wrong time format, you can assign errors to ‘ignore’, so that the original format is the same.
errors{‘ignore’, ‘raise’, ‘coerce’}, default ‘raise’
If ‘raise’, then invalid parsing will raise an exception.If ‘coerce’, then invalid parsing will be set as NaT.If ‘ignore’, then invalid parsing will return the input.
reason:
The data block size is 8K, and the size of a single data file is limited to 32GB.
terms of settlement:
1. The way of adding table space data file
2. Create bigfile table space.
The relationship between data file size and database