python中如何输出引号

Posted 2023-05-12

RT
如何用.：print输出引号（',"）或其他特殊符号？？

使用转义符输出。

如>>>print ( ' \\" ')可打印双引号，>>>print ( " \\' " ) 可打印单引号。

若要成对打印，可通过>>>print ( ' \\"\\'' ')或>>>print ( ' \\"\\" ' )实现。

所有的ASCII码都可以用“\\”加数字（一般是8进制数字）来表示。

而C中定义了一些字母前加"\\"来表示常见的那些不能显示的ASCII字符，如\\0,\\t,\\n等，就称为转义字符，因为后面的字符，都不是它本来的ASCII字符意思了。 

扩展资料：

其他可通过转义符输出的字符：

参考资料：百度百科-转义符

参考技术A 像换行这些需要转义的符号，需要在前面添加转义符\，比如
print "\n\r"

如果输出双引号，可以转义，也可以用单引号把双引号包含起来
print "\""
print '"'

输出单引号，同理可以用双引号将单引号包含起来
print "'"本回答被提问者采纳 参考技术B 用s=r''' '''括起来就好（成对的三个单引号或双引号都行） 参考技术C print '"',"'","\n","\t"

如何在 Python csv writer 中将单引号替换为双引号？

【中文标题】如何在 Python csv writer 中将单引号替换为双引号？

【英文标题】：How to replace a single quote to double quote in Python csv writer?

【发布时间】：2016-02-09 13:34:12

【问题描述】：

我一直在尝试使用 python 输出一个 csv 文件。没有引号和数字就可以正常工作。示例：

代码：

for n in G:
    centrality = nx.degree_centrality(G)
    betweeness = nx.betweenness_centrality(G)
    edges = nx.edges(G, n)
    csv_out.writerow([n, str(edges).replace("'",""), round(centrality[n],2), round(betweeness[n],2)])

输出：

24,"[(24, 31), (24, 64)]",0.02,0.04
25,"[(25, 77)]",0.01,0.0
26,"[(26, 49)]",0.01,0.0
27,"[(27, 75), (27, 79)]",0.02,0.02
20,"[(20, 9), (20, 84), (20, 40)]",0.03,0.03
21,"[(21, 77), (21, 64)]",0.02,0.02

我还需要能够输入字符串数据。示例：

Automation Specialist I,"[(Automation Specialist I, Data Coordiator)]",0.01,0.0
Community Outreach Specialist,"[(Community Outreach Specialist, Librarian)]",0.01,0.0
Research Assistant III,"[(Research Assistant III, Senior Quality Engineer)]",0.01,0.0
Cost Accountant,"[(Cost Accountant, Structural Engineer)]",0.01,0.0
Data Coordiator,"[(Data Coordiator, Technical Writer), (Data Coordiator, Automation Specialist I)]",0.02,0.01

但是我需要一个引用的值才能在前端处理它。像这样：

Automation Specialist I,"[("Automation Specialist I", "Data Coordiator")]",0.01,0.0
Community Outreach Specialist,"[("Community Outreach Specialist", "Librarian")]",0.01,0.0
Research Assistant III,"[("Research Assistant III", "Senior Quality Engineer")]",0.01,0.0
Cost Accountant,"[("Cost Accountant", "Structural Engineer")]",0.01,0.0
Data Coordiator,"[("Data Coordiator", "Technical Writer"), ("Data Coordiator", "Automation Specialist I")]",0.02,0.01

所以我使用了下面的代码：

csv_out.writerow([n, str(edges).replace("'",'"'), round(centrality[n],2), round(betweeness[n],2)])

但是，结果是这样的：

对于数字：

24,"[(""24"", ""31""), (""24"", ""64"")]",0.02,0.04
25,"[(""25"", ""77"")]",0.01,0.0
26,"[(""26"", ""49"")]",0.01,0.0

对于字符串：

Automation Specialist I,"[(""Automation Specialist I"", ""Data Coordiator"")]",0.01,0.0
Community Outreach Specialist,"[(""Community Outreach Specialist"", ""Librarian")]"",0.01,0.0

我还尝试用撇号替换 out 引号（列表之外），但没有成功。我也尝试使用下面的代码，但它给出的结果与上面相同。

str(edges).replace("'",'"').replace('""','"')

我应该怎么做才能得到我想要的结果？ 我计划在之后过滤输入的类型，以便仅在为字符串时应用该技术。因为如果是数字，理想的输出就是第一个例子。当我使用最后一个时，我的前端代码处理文本和数字。但是当我使用第一个示例时，它不适用于文本，仅适用于数字。

你能帮帮我吗？ 如何将撇号替换为引号？ 非常感谢。

【问题讨论】：

quotechar option 应该给你你想要的。您不应该尝试自己修改 CSV 文件 - 格式看起来很简单，但要正确执行实际上相当棘手。 （csv_out 对象的定义是相关的，把它带入问题对你有好处。）

如果你不尝试替换任何东西，你能告诉我们这条线的样子吗？我想看看未格式化的文本是什么样的......我也对这个 str(edges).replace("'",'"').replace('""','"') 感到困惑你为什么做" ' " 以及 ' " ' 和 ' "" ' .... 你为什么使用不同的格式？

写“[(""Automation Specialist I"", ""Data Coordinator"")]"有什么问题？引号字符应该在原始 CSV 格式中加倍。使用像样的 CSV 解析器（如 Excel）读取此 CSV 将生成字符串 [("Automation Specialist I", "Data Coordinator")]，这对您的前端来说似乎没问题。

【参考方案1】：

我最终使用了以下代码：

if(is_number(n) == True):
    edges_w = str(edges).replace("'","")
else:
    edges_w = str(edges).replace("'",'"')

我使用了一个函数来检查它是否是一个数字，然后根据这个函数的返回值替换了str。我考虑过@Stein cmets 来使用这个解决方案。

【讨论】：

如果字符串中间有'引号，比如撇号怎么办。

【参考方案2】：

尝试用反斜杠转义双引号。例如

str(edges).replace("'","\"")

【讨论】：

这与 Jaqueline 所做的完全一样，只是风格问题，python 似乎更喜欢 Jaqueline 的风格而不是你的风格：在 python 提示符上输入 "\""，python 将其回显为 @ 987654323@