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把password的字段長(zhǎng)度改成255

前端瀏覽器請(qǐng)求web服務(wù)器是有超時(shí)時(shí)間限制的（nginx或apache），可以配置，但是如果服務(wù)端處理時(shí)間過(guò)長(zhǎng)，連接請(qǐng)求就會(huì)斷掉，且http是無(wú)狀態(tài)的。除非人工維護(hù)一個(gè)長(zhǎng)連接或則使用http1.1里面的keeplive特性。但最好的方式是加快服務(wù)端處理速度。

from openpyxl import load_workbook
import pandas as pd
wb = load_workbook(filename = 'empty_book.xlsx')
sheet_names = wb.get_sheet_names()
name = sheet_names[0]
sheet_ranges = wb[name]
df = pd.DataFrame(sheet_ranges.values)

搬運(yùn)自：https://stackoverflow.com/que...

簡(jiǎn)單來(lái)說(shuō)是有特別的標(biāo)志位。Wiki上是這么說(shuō)的：

In IEEE 754 standard-conforming floating-point storage formats, NaNs are identified by specific, pre-defined bit patterns unique to NaNs. The sign bit does not matter. Binary format NaNs are represented with the exponential field filled with ones (like infinity values), and some non-zero number in the significand field (to make them distinct from infinity values). The original IEEE 754 standard from 1985 (IEEE 754-1985) only described binary floating-point formats, and did not specify how the signaling/quiet state was to be tagged. In practice, the most significant bit of the significand field determined whether a NaN is signaling or quiet. Two different implementations, with reversed meanings, resulted:
most processors (including those of the Intel and AMD's x86 family, the Motorola 68000 family, the AIM PowerPC family, the ARM family, the Sun SPARC family, and optionally new MIPS processors) set the signaling/quiet bit to non-zero if the NaN is quiet, and to zero if the NaN is signaling. Thus, on these processors, the bit represents an 'is_quiet' flag;
in NaNs generated by the PA-RISC and old MIPS processors, the signaling/quiet bit is zero if the NaN is quiet, and non-zero if the NaN is signaling. Thus, on these processors, the bit represents an 'is_signaling' flag.
The former choice has been preferred as it allows the implementation to quiet a signaling NaN by just setting the signaling/quiet bit to 1. The reverse is not possible with the latter choice because setting the signaling/quiet bit to 0 could yield an infinity.
The 2008 revision of the IEEE 754 standard (IEEE 754-2008) makes formal recommendations for the encoding of the signaling/quiet state.
For binary formats, the most significant bit of the significand field should be an 'is_quiet' flag. I.e. this bit is non-zero if the NaN is quiet, and zero if the NaN is signaling.
For decimal formats, whether binary or decimal encoded, a NaN is identified by having the top five bits of the combination field after the sign bit set to ones. The sixth bit of the field is the 'is_quiet' flag. The standard follows the interpretation as an 'is_signaling' flag. I.e. the signaling/quiet bit is zero if the NaN is quiet, and non-zero if the NaN is signaling. A signaling NaN is quieted by clearing this sixth bit.
For IEEE 754-2008 conformance, the meaning of the signaling/quiet bit in recent MIPS processors is now configurable via the NAN2008 field of the FCSR register. This support is optional in MIPS Release 3 and required in Release 5.[10]
The state/value of the remaining bits of the significand field are not defined by the standard. This value is called the 'payload' of the NaN. If an operation has a single NaN input and propagates it to the output, the result NaN's payload should be that of the input NaN (this is not always possible for binary formats when the signaling/quiet state is encoded by an 'is_signaling' flag, as explained above). If there are multiple NaN inputs, the result NaN's payload should be from one of the input NaNs; the standard does not specify which.

python 3.0之前的版本zlib.crc32(binascii.a2b_hex("124578ab"), 0x01020304) & 0xffffffff
參考https://docs.python.org/2.7/l...

graphql的本質(zhì)其實(shí)是字符串，所以你如果是前端只需要傳遞字符串即可

params = {'query': '''{
  viewer {
    name
  }
}'''}
res = requests.post(url=url, params=params)

其中query是自定義的參數(shù)名，取決于后端如何解析，graphql對(duì)后端的要求較高，目前除了nodejs沒(méi)有特別好用的后端。
個(gè)人感覺(jué)graphql特別適合查詢(xún)圖數(shù)據(jù)庫(kù)，對(duì)于關(guān)系型數(shù)據(jù)庫(kù)我一直沒(méi)找到比較好用的后端模塊

又是你……！

第一:你的代碼格式能弄好嗎?看的很亂,盯不清大括號(hào);
第二:控制臺(tái)默認(rèn)能顯示80000個(gè)字符,你的java文件有多大....竟然顯示不下.

select column ；這個(gè)column可以自定義

直接用conda環(huán)境，里面帶的就是qt 5.6

Promise
之前直接開(kāi)啟loading狀態(tài)
resolve
后關(guān)閉loading

監(jiān)控用戶(hù)點(diǎn)擊另存為不是
oncontextmenu嗎

既然知道邏輯，為什么不自己寫(xiě)？ 這都能繞暈，那你更應(yīng)該鍛煉你的邏輯思維了

為何不用官方編譯好的軟件包？安裝完自帶service腳本，省時(shí)省力，干嘛要自己編譯？

三個(gè)字符串轉(zhuǎn)集合求交集

a = '6171156'
b = '1564687'
c = '1679813'

set(a) & set(b) & set(c)

// {'7', '6', '1'}

檢查一下Apache2.2modules是不是有這個(gè)模塊, 右鍵屬性查一下全名,擴(kuò)展名對(duì)不對(duì)(也有可能是.dll而不是.so).
還有就是64位和32位的問(wèn)題. 32位的apache2要用32位的python, 64位的也一樣.

python3

bytes([int(x,2) for x in b]).decode('utf-8')

<span>
    <span>test</span>
    <span>.pdf</span>
</span>

from lxml import etree
html = etree.parse('hello.html')
result = html.xpath('//span/span/text()')
print(result)

運(yùn)行結(jié)果['test', '.pdf']

解決了，只要在后面加上.decode().strip()即可

我們是在用戶(hù)注冊(cè)以及修改用戶(hù)名是進(jìn)行這個(gè)敏感詞過(guò)濾。
redis中存儲(chǔ)著敏感詞庫(kù)。
用戶(hù)輸入，之后通過(guò)kmp算法匹配敏感詞是否在用戶(hù)輸入中

我感覺(jué)這個(gè)寫(xiě)法是不對(duì)的。寫(xiě)正則時(shí)思路就跟著你的規(guī)定走就行了（你沒(méi)有說(shuō)清你的規(guī)定，我就按自己的規(guī)定了）：

• 不帶指數(shù)的整數(shù)，必須有整數(shù)部分，正號(hào)可省略：[\+-]?\d+。這就是正號(hào)可有可無(wú)，符號(hào)不可省略，可以有若干前導(dǎo)0的整數(shù)。不妨用符號(hào)Int表示這個(gè)正則表達(dá)式；
• 不帶指數(shù)的小數(shù)，除了必須有整數(shù)部分外，還必須有以小數(shù)點(diǎn).開(kāi)頭的小數(shù)部分：Int加上\.\d+，即[\+-]?\d+\.\d+。不妨用符號(hào)Float表示這個(gè)正則表達(dá)式；
• 不帶指數(shù)的數(shù)（整數(shù)或小數(shù)），必須有整數(shù)部分，以.開(kāi)頭的小數(shù)部分可有可無(wú)：Int加上(\.\d+)?，即[\+-]?\d+(\.\d+)?。不妨用符號(hào)Number表示這個(gè)正則表達(dá)式；
• 帶指數(shù)的數(shù)（整數(shù)或小數(shù)），指數(shù)部分以e或E開(kāi)頭，指數(shù)必須是整數(shù)：Number（底數(shù)）加上[eE]加上Int，即[\+-]?\d+(\.\d+)?[eE][\+-]?\d+。不妨用符號(hào)ENumber表示這個(gè)正則表達(dá)式；

總結(jié)：一個(gè)合法的數(shù)，底數(shù)部分必須包含整數(shù)部分，其小數(shù)部分可有可無(wú)；指數(shù)部分可有可無(wú)，若有，則必須以e或E開(kāi)頭，且指數(shù)為先前定義的整數(shù)。

結(jié)果：[\+-]?\d+(\.\d+)?([eE][\+-]?\d+)?。最外層的兩個(gè)(...)?依次表示“底數(shù)部分的小數(shù)部分可有可無(wú)”和“指數(shù)部分可有可無(wú)”。

如果你要判斷而不是匹配，那將輸入trim后在原先的正則前后分別補(bǔ)上^和$。